Next game, NEED help!!!!

I really want a new 360 game and i don't know which one to get. Please help me out.I just got my 360 about a month ago and only have Gears of War,Crackdown, and Guitar Hero 2

Depends on what type of games you are into...

Sports- MLB 2k7, NBA2k7, Virtua Tennis and Top Spin are suprisingly good... Madden and NCAA football are coming out, so is NASCAR 08

Racing- Forza 2

Shooters- GRAW 2 or R6V... or FEAR

Stealth- Hitman and Splinter Cell DA 

RPG- Oblivion

Platform- Marvel Ultimate alliance

Free roam- Saints Row 

I could go on. The 360 has tons of great options to choose from! 

Dead Rising ws fun and enough of a challenge to keep you entertained for a while.

Call of Duty 2... Great game on the cheap.

Pick up some of the games on the Backwards compatibility list that you havn't played yet..