Fairly new to 360, recommended games?

So I just recently started playing 360. I'm trying to build a game library of decent games and looking to pick up older titles that are good that I missed out on. So far here is my list:

Lego Batman/Indiana Jones/Star Wars ( I was shocked how I loved these simple games)

Halo 3

FEAR

Call of Duty 5 (the game that got me on the 360 kick)

The Orange Box

Time Shift

Dark Sector

Fallout 3

Grand Theft Auto 4

Prince of Persia

Dead Space

Save your money for Resident Evil 5, Star Ocean, and Street Fighter.Wiishy

Already plan on picking these up. I plan on staying ontop of the newer games. Picking up Left 4 Dead soon and FEAR 2 as soon as it comes out. Older games are usually cheap and you can find them used even cheaper so just looking to build a good base of games.

Time Shift Dark Sector Prince of Persia

Bioshock

Gears of War

Gears of War 2

Civilisation: Revolution

GTA IV

Call Of Duty 4: Modern Warfare

FIFA 09

Pure

Ah forgot I have Fable II and Gears of War 2 also. I haven't played them much so totally forgot about them. All the games I have listed up top are games I have. Anyone know if Enchanted Arms is any good? I was told it was a good older game.TheSylntChamber

Enchanted Arms was fair at best. If you're looking for a good older RPG, go with Lost Odyssey, Eternal Sonata, or Mass Effect. All very good RPG's.

Deadspace

Fallout3

Left 4 Dead

NHL 09

Viva Pinata: Trouble in Paradise

Well i have two neither you or anyone else listed, that are in my opinion are really good.

Oblivion

Dead or Alive 4

GRAW 1&2

Rainbow Six Vegas 1&2

And if you dont have them already for any other console, any of the guitar hero or rock band games.