"It’s May and that means… well, I don’t know what it usually means but here’s May Madness." Hah! Agreed. Just don't go the opposite route and do a No Sale November or something.
Anyways, just look at the giant list of PS4, PS3, Vita, and PS1 games here. Maybe buy Okami HD and Resident Evil 4 HD and XCOM: Enemy Within (that's a real nice discount) and whatever the heck else you want.