No point in renting Crackdown since a rental is $8.50 and the game can be had for probably $15-20 brand new on ebay or somewhere else on the net. Definitely buy that game; it's incredible.
Same deal with Kameo... that game is literally 10 bucks new on ebay so renting it is pointless. Don't listen to the haters. Buy Kameo...it's a nice, refreshing game with amazing visuals to boot. You're gonna want some non-shooter games to play and Kameo is a perfect compliment to your library.
Some more recommendations:
- Gamefly.com has amazing sales on used games
- Do you like multi-player shooters? Battlefield: Bad Company, Halo 3, COD4, etc., are must-buys if you like online games
- Mass Effect... an absolute masterpiece. ($25-30 new)
- Bioshock... same as above ($25-30 new)
- Dead Rising ($25-30 new)
- Lost Planet Colonies edition is $30 retail and it's a love/hate game... I fucking love it. Check out the demo on marketplace
- In fact... first thing you should do is download all the demos. Queue that shit up overnight
- Rent LEGO Indiana Jones... great game
- Lost Odyssey is supposed to be great
- Avoid GTA4 like the plague... most disappointing game of all time