One of the things I like most about MW2 are the unlockable titles and emblems and all the combos you can make with them. I usually try to make mine something that most people don't use. Right now mine is the "Starfish Prime" title with the Lightbulb emblem that you get for beating the "Think Fast Flash" challenge. Other ones I like are the "Live Long" and "Epic" titles and just about any of the killstreak emblems. (especially the EMP one)
What about yours?
I like the Spectre title. Right now I am working on getting the 10th prestige emblem from the original Modern Warfare from the Spectre challenge. Really easy to spawn kill with an AC130. Like yesterday, when I caught all 3 of the opponents on Team Tactical with the first shell, so I had like 30 kills off of them from the spawns.
mine right now, is the "Epic" title
and the snowy version of Captain Price for my emblem
I've been alternating between:
Droppin' Crates
Decathlete
Pathfinder
Chick Magnet