WOW I got these crazy questions to ask, but they are so hear and opinion questions that don't start flame wars for consoles.
On Topic: I purchase around 5 or 10 games per month, it depends on price and whether I finished a particular game to warrant my purchase. I have Two Worlds, Tomb Raider Legend, Fable, and Madden NFL 08. And I haven't beaten nearly one of them yet but are still hungry for some more games. I'm thinking about getting Condemened:Criminal Origins, and Call of Duty 2 for the 360 since they are $20 a piece.