Here's some of my favorite video games and video game series.

Street Fighter
Advance Wars (definitely)
Mario
Pokemon
Marvel VS Capcom
Sonic the Hedgehog (only Advance series, Rush series, and Adventure series)
Guilty Gear
Blazblue
Persona
Disgaea (only played 3 and 4 so far)
Ghost and Goblins
Rock Band
Guitar Hero
Megaman
Rayman (excluding Raving Rabbits. Never played those)
Castlevania (Handhelds)
Patapon (definitely)
LocoRoco (definitely)
LittleBigPlanet
The King of Fighters
Samurai Shodown
Last Blade
Capcom VS SNK
Tekken
Soul Calibur
Virtua Fighter (only played 2 and 3 so far)
Touhou
Shikigami No Shiro
Skullgirls
Shin Megami Tensei (I actually love these more then the Persona series)
Dodonpachi
Vocaloid (definitely)
LittleBigPlanet
Ratchet and Clank
Fire Emblem
Project DIVA (definitely)
Pop 'n Music (definitely)
DJMax (definitely)
Jak and Daxter
Mortal Kombat
Killer Instinct

The games I completed:

NES (3)
Super Mario Bros.
The Legend of Zelda
Metroid

SNES (7)
Super Mario World
Super Mario Bros.
Super Mario Bros. 2
Super Mario Bros. 3
Super Mario Bros. The Lost Levels
Acro Bat
Super Metroid

Neo Geo (26)
The King of Fighters 94
The King of Fighters 95
The King of Fighters 96
The King of Fighters 97
The King of Fighters 98
The King of Fighters 99
The King of Fighters 2000
The King of Fighters 2001
The King of Fighters 2002
The King of Fighters 2003
Samurai Shodown
Samurai Shodown 2
Samurai Shodown 3
Samurai Shodown 4
Samurai Shodown 5
Samurai Shodown 5 Special
Metal Slug
Metal Slug 2
Metal Slug 3
Metal Slug 4
Metal Slug 5
Last Blade
Last Blade 2
World Heroes
World Heroes 2
Magician Lord

Genesis (13)
Sonic the Hedgehog
Sonic the Hedgehog 2
Sonic the Hedgehog 3
Sonic and Knuckles
Golden Axe
Golden Axe 2 (NEW)
Golden Axe 3 (NEW)
Altered Beast (NEW)
Street of Rage (NEW)
Street of Rage 2 (NEW)
Street of Rage 3 (NEW)
Vectorman (NEW)
Vectorman 2 (NEW)

N64 (4)
Pokemon Stadium
Pokemon Stadium 2
Kirby 64: The Crystal Shards
Super Mario 64

GC (8)
Zelda: The Wind Waker
Sonic Adventure DX: Director's Cut
Sonic Adventure 2 Battle
Super Mario Sunshine
Pokemon Colosseum
Dragon Ball Z Budokai
Dragon Ball Z Budokai 2
Megaman Battle Network Transmission

PS1 (10)
Spyro the Dragon
Spyro 2 Ripto's Rage!
Spyro: Year of the Dragon
Crash Bandicoot
Crash 2 Cortex Strikes Back
Crash Bandicoot Warped
Crash Team Racing
Crash Bash
Cacom VS SNK
Final Fantasy Origins (NEW)

PS2 (12)
Dragon Ball Z Budokai 3
Dragon Ball Z Tenkaichi
Capcom VS SNK 2
Marvel VS Capcom 2
Disgaea Hour of Darkness
Disgaea 2 Cursed Memories
Tekken Tag Tournament
Tekken 3
Tekken 4
Capcom VS SNK 2
Persona 3
Shadow the Hedgehog

PS3 (27)
GaiaSeed
Rayman
Final Fantasy 7
Arcana Heart 3
Persona 4 Arena
Blazblue Calamity Trigger
Blazblue Continuum Shift
Blazblue Continuum Shift Extend
Street Fighter 3 Third Strike
Super Street Fighter 4 Arcade Edition
Tekken 5 HD
Tekken 6
Disgaea 4
Persona 3 FES
Final Fantasy 13
Final Fantasy 13-2
Virtua Fighter 5
The Fancy Pants Adventure
LittleBigPlanet
Modnation Racers
Infamous
Infamous 2
Mortal Kombat 9
DC Universe Online
The King of Fighters XIII
Playstation All-Stars Battle Royal (NEW)
Tekken Tag Tournament 2 (NEW)

PC (23)
Touhou 6 Embodiment of Scarlet Devil
Touhou 7 Perfect Cherry Blossom
Touhou 7.5 Immaterial and Missing Power
Touhou 8 Imperishable Night
Touhou 9 Phantasmagoria of Flower View
Touhou 9.5 Shoot the Bullet
Touhou 10 Mountain of Faith
Touhou 10.5 Scarlet Weather Rhapsody
Touhou 11 Subterrainean Animism
Touhou 12 Unidentified Fantastic Object
Touhou 12.3 Hisoutensoku
Touhou 12.5 Double Spoiler
Touhou 12.8 Great Fairy Wars
Touhou 13 Ten Desires
Melty Blood
Melty Blood React
Melty Blood Act Cadenza
Melty Blood Actress Again
Guilty Gear Isuka
Minecraft
Sonic CD
Sonic R
Sonic Heroes

GBC (14)
Pokemon Yellow
Pokemon Blue
Pokemon Red
Pokemon Gold
Pokemon Silver
Pokemon Crystal
Tom & Jerry
Hamtaro Ham Hams Unite
The Powerpuff Girls: Bad Mojo Jojo
The Powerpuff Girls: Paint the Townsville Green
The Powerpuff Girls: Battle HIM
Dragon Tales
Kirby Tilt N' Tumble

GBA (27)
Pokemon Ruby
Pokemon Sapphire
Pokemon Emerald
Pokemon Fire Red
Pokemon Pinball
Fire Emblem
Fire Emblem Sacred Stones
Advance Wars
Advance Wars 2 Black Hole Rising
Yoshi Island
Dragon Ball Z Super Sonic Warriors
Tekken Advance
Street Fighter Alpha 3 Upper
Golden Sun
Megaman Zero
Megaman Zero 4
Megaman Battle Network 2
Megaman Battle Network 3
Megaman Battle Network 4
Megaman Battle Network 5
Megaman Battle Network 6
Sonic Advance
Sonic Advance 2
Sonic Advance 3
Sonic Battle
Kirby Nightmare in Dream Land
Kirby Amazing Mirror

DS (57)
Pokemon Diamond
Pokemon Pearl
Pokemon Emerald
Pokemon White
Pokemon Black 2
Dragon Quest 4 Chapters of the Chosen
Dragon Quest 5 Hands of the Heavenly Bride
Dragon Quest 6 Realms of Revelation
Dragon Quest Monsters Joker
Dragon Quest 9 Sentinels of the Starry Skies
Bleach Blade of Fate
Bleach Dark Souls
Kingdom Hearts Re:Coded
Pokemon Trozei
Pokemon Mystery Dungeon Blue
Pokemon Mystery Dungeon Explorers of Time
Pokemon Mystery Dungeon Explorers of the Sky
Pokemon Ranger
Pokemon Ranger Shadows of Almia
Luminous Arc
Luminous Arc 2
Final Fantasy A2 Tactics
Shin Megami Tensei Strange Journey
Shin Megami Tensei Devil Survivor 2
Megaman Zero (Megaman Zero Collection)
Megaman Zero 2 (Megaman Zero Collection)
Megaman Zero 3 (Megaman Zero Collection)
Megaman Zero 4 (Megaman Zero Collection)
Megaman ZX
Megaman ZX Advent
Megaman Starforce
Megaman Starforce 2
Megaman Starforce 3 Black Joker
Lunar Knights
Metal Slug 7
Zelda Phantom Hourglass
Zelda Spirit Tracks
Knights in the Nightmare
Yoshi Touch and Go
Yoshi Island 2
Super Mario 64 DS
New Super Mario Bros.
Cave Story
Sonic Rush
Sonic Rush Adventure
Sonic Chronicles The Dark Brotherhood
Star Fox DS
Fire Emblem Shadow Dragon
Advance Wars Dual Strike
Advance Wars Days of Ruin
Kirby Canvas Curse
Castlevania: Order of Ecclesia
Castlevania: Dawn of Sorrow
Castlevania: Portrait of Ruin
Radiant Historia
The World Ends With You
Luminous Arc 3

PSP (58)
Castlevania Dracula X Chronicles
Castlevania Rondo of Blood
Castlevania Symphony of the Night
Persona
Persona 2 Innocnet Sin
Persona 3 Portable
Final Fantasy Dissidia
Disgaea Afternoon of Darkness
Disgaea 2 Dark Hero Days
Prinny Can I really Be the Hero?
Prinny Dawn of Oeration Panties Dood!
Phantom Brave
Tactics Ogre Let Us Cling Together
Final Fantasy Tactics War of the Lions
Yggdra Union
Knights in the Nightmare
What Did I Do to Deserve This, My Lord?
What Did I Do to Deserve This, My Lord? 2
No Heroes Allowed!
Cladun: This is An RPG
Cladun: This is An RPG X2
Fate/ Unlimited Codes
Fate/ Extra
Street Fighter Alpha 3 Max
Street Fighter 2
Street Fighter 2 Champion
Street Fighter 2 Hyper Fighting
Ghost And Goblins
Super Ghosts and Goblins
Goblins and Ghouls
Final Fight
Street Fighter
Samurai Shodown 6
Metal Slug 6
Metal Slug XX
LittleBigPlanet PSP
Lumines
Lumines 2
Every Extend Extra
Tekken 6
Blazblue Calamity Trigger
Blazblue Continuum Shift 2
Guilty Gear XX Access Core +
LocoRoco 2
Patapon 2
Patapon 3
Wipeout Pulse
Wipeout Pure
Project Diva
Kingdom Hearts Birth By Sleep (NEW)
Final Fantasy Anniversery Edition (NEW)
Final Fantasy II Anniversary Edition (NEW)
Final Fantasy III (NEW)
Final Fantasy IV (NEW)
Final Fantasy IV Intrelude (NEW)
Final Fantasy IV The After Years (NEW)
Dissidia Final Fantasy Duodecim (NEW)

3DS (10)
Kid Icarus Uprising
Shin Megami Tensei Devil Survivor Overclocked
Super Mario 3D Land
Zelda Ocarina of Time
Mutant Mudds
VVVVVV
Dead or Alive Dimensions
Super Street Fighter 4
Pokemon Rumble Blast
Code of Princess

PSVita (8)
Ultimate Marvel VS Capcom 3
Blazblue Continuum Shift Extend
Rayman Origins
Disgaea 3 Absence of Detention
Persona 4 Golden (NEW)
Lumines Electric Symphony (NEW)
Street Fighter X Tekken (NEW)
Aqua Kitty (NEW)

Total So Far: 292 Games Completed (23 NEW GAMES COMPLETED!)