Cute game, and I adore the concept. You play as a troubled spirit that can't rest simply because everyone in the entire town, in every building even, are having a party and making too much noise. The game can be fun the first time through, but I beat the entire game (all 4 buildings) in 34 minutes on my first run. This sucks, since the game has almost zero replayability. At its current price you may as well just skip it.
Need for Speed: Most Wanted $39.99
This game is one of the worst racing games I've ever played. Most of the time the only indicator of what is and is not the track is your minimap; unless you stare at it you will likely fly right past every turn you're supposed to take. The framerate is atrocious, dipping into COUNTABLE territory way too often. Good time waster, appalling racing game. Even the iPhone/iPad/Android version is a better racer.
Gravity Rush $35.99, free with PlayStation Plus
One of my favorite games for the platform and something that goes beyond what I would call a "platformer". The story is a bit nonsensical and disjointed, but the cel-shaded art style and jazz/orchestral soundtrack are fantastic. The controls feel a bit loose, something I hope is taken care of in any future installments. The game has a good length to it, and some of the side missions are actually enough fun to go back and try to beat your best scores. Definitely the first must-buy for a Vita owner.
WipEout 2048 $17.99, free with PlayStation Plus
Probably the best racer on the platform, though that really isn't saying much right now. Capable of playing cross-platform with the PS3 and actually has a great assortment of tracks, my biggest complaint is the framerate. 30 FPS doesn't kill a game for me, but this is a racing game. 30 FPS would be fine if the game always ran like that, but it dips so often and each dip feels like you've lost control of your ship until the framerate goes back up. Free with PlayStation Plus, so I guess I can't complain.
Ninja Gaiden Sigma Plus $34.99, free with PlayStation Plus
Bad Camera Angles: The Game. Seriously, this could be a really fun game if I had a good view of what I was doing at least half of the time I spent playing it. I've spent hours in the Ninja Trials mode just fighting enemies in closed-off arenas and had a blast, but the camera absolutely ruins everything else. I missed one jump in the story mode at least 4 times because I couldn't even get the camera to look at the platform I was jumping to. Again, free with PlayStation Plus, so I got what I paid for.
LittleBigPlanet PS Vita $35.99
The second on the "must buy" list. This is probably the best LittleBigPlanet thus far. While I would rather play the story mode of LittleBigPlanet 2, this had it beat in terms of what you can do with the level creator. Having a built-in microphone and keyboard is great for playing online, which also works pretty well. I love this game.
Frobisher Says! (free)
It's WarioWare for the PS Vita. That's really all I can say. It's a collection of super-short minigames that get faster and harder the longer you can go without losing one. You can pass the vita around as a fun party game. It's FREE!
Retro City Rampage $14.99, free with PlayStation Plus
The final "must buy" game of this list. It's a top-down 8-bit action homage to the 80's and it is fantastic. The storyline is funny, and even after you beat it the game is a great time waster that feels like it was made specifically with quick, mobile play sessions in mind. The only problem is you have to actually close the game and re-open it if you enter a cheat code, since it disables saving until you do. What the hell.
That's all for now, I may or may not keep this coming.