Weapon of Choose (FPS)

[Magnum]

Halo has a supreme following of, lets admit, mostly little kids. The first was considered one of the best FPS games ever that actually took on a heavy story instead of just leaving it at the first cutscene. Multiple weapons, balanced gameplay, and a wide variety of game types to choose from.
Call of Duty now has the most people online for any shooter game. This game is a blockbuster movie compressed in 20 or so mission with explosion, nukes, and the most badass leader ever, Price. While the gameplay for it is usually easy to hack, and Infinity Ward isn't the best coders we've ever seen, it still shines through.
Battlefield recently took a left turn and is now going in its own direction. With fully destructible environments, Battlefield has set itself away from the regular FPS. Games like Bad Company also bring in the Single-Player mode, but what is really great is the amazing number of options for you set-up. These guys had customization before it was cool.
Team Fortress is made from Value. That's about all there is too it. You kill the Red Spy. You laugh and eat a Sandvich. End.
Then there is other. Oh wait...

So, my question is, what is your game of choose for everyone who has an X-Box 360. Anyone who plays with me should know my choose and that is Call of Duty. I can almost guarentee that I will have each one of them when they come out.

[Turok]

You can hate on me for it, but my FPS of choice is Perfect Dark Zero. (until I get the remake that is)
Yeah, its not better than the original, but it still has the awesome gameplay in a Live enabled (BLOOMIER) package. & if it wasn't for this Gears of War probably wouldn't have a cover system.

[The Riddler]

For Xbox 360? Call of Duty, no questions asked.
For PC? TF2, but back in the day it was Battlefield 1942.

[Custom]

Battlefield has the best war games. TF2 has the best gameplay. Call of Duty is a piece of poop.

[Doodle]

>Team Fortress is made from Value
>Value

Valve, son.
My favorite is probably Perfect Dark. I played that for hours, and spent even more with the multiplayer.
MW2 and the like are just time wasters for me.

[BOREDFOREVER]

I've probably sunk the most time into MW2's multiplayer, and COD4 had one of the best FPS stories ever. 

Gears I & II were fun for mindless gunplay, but I didn't do a lot online.  (Third person, I know, but they always get pulled into FPS discussions)

TF2 was fun online, but it was way too glitchy on the 360.  It seemed like every map someone had a turret built 50 ft in the air.

COD:WaW was alright, but a lot of thier glitches went unpatched, like the Roundhouse hole in the ground.

Left for Dead was fun, but it just didn't have a lot of staying power with me; I moved on pretty quickly.

I never had a hard-on for Halo, so Halo 3 was alright, but I never took it online because I didn't want to deal with the online Halo community.

Half-Life 2 Episode 2 was intercourse ing fantastic.  Fun as hell.  I love the gravity gun.

Boderlands was fun, but I felt like the gun variety was waaaayyy over-hped.  At the end of the day, it was just tiny variations on normal themes.  The different aberations within one gun type typically felt too much alike.

I like both the single player and multi-player of Battlefield: Bad Company.  I haven't really gotten into 2.

Timeshift sucked.