If you like any type of game, Gears will appeal to you, it is the game that made me get 360.
Gameplay- The gameplay is insanely fun, the cover system is so cool, and different. The controls are perfect, and the story is good. This will make you forget about Halo, it's just so awesome.
Graphics- These graphics are not comparable to anything else, with the exception of Crysis. The detail is unbelievable, with the blood spewing on the wall, and the Locust attacking from all directions. Sound- Great, VO's, guns sounds great, nothing amazing though, just what you'd expect.
Value- Three difficulties, and the XBL multiplayer is amazing. If you get this game, make sure you check it out on multiplayer, VERY fun and addicting.
Tilt- This game is breathaking, an instant classic. If you have a 360, and don't have this game, it's a cardinal sin.