Personal top 3 Xbox games?

Easy question, easy exp:

List your personal Top 3 fav games on the Xbox 360. (Doesnt necesarily needs to exclusives)

Looking to buy a new game since I recently bought myself a 360 so I'm hoping to get some good suggestions.

Halo Reach, COD MW2 and Forza 3

My 3 favorite single-player games/series on the Xbox360 are:
Mass Effect series, Dead Rising series, and Fallout series.

My 3 favorite online co-op games/series on the Xbox360 are:
Dead Rising 2, Halo Reach, and Operation Flashpoint: Dragon Rising(could be great if people would play it).

My 3 favorite online multi-player games/series on the Xbox360 are:
Battlefield series(BF2: Modern Combat, BF: Bad Company 1 and 2), Frontlines: Fuel of War, and CoD4/Black OPS.

black ops 4 sure

in no particular order:

GTA IV

COD 4

can't think of anything else right now

Forza Motorsport 3, Assassin's Creed 1, and Bad Company 2.

bioshock, red dead redemption and i dunno. i play black ops alot but i hate it so that cant be on the list. hmmm i suppose id say dead space 1 or 2. i love that series

Top 3 Sp games- Batman AA, Oblivion, Mass Effect 2

Top 3 MP games- Black Ops, Halo Reach, MW2

Top 3 XBLA- Super Meat Boy, Castle Crashers and Torchlight when it's finally released

Single Player:

1. BioShock 2. Grand Theft Auto 4 3. The Orange Box

Multiplayer:

1. Rainbow Six Vegas (I played this game way to much) 2. Call of Duty series 3. Ghost Recon series

Bioshock, Gears 1, RE5.

Fallout 3, Halo: Reach, and hm.....it's a toss up among a lot of games, but right now I think I have to say Batman: Arkham Asylum.

Hon Mention: New Vegas, Red Dead Redemption, COD 4