dude, that's quite normal, it's such an open world with so much going on at the same time, if they would make the graphics crysis-like the world has to be a lot smaller and it would cut out all of the fun. And besides GTA is about the fantastic open world, the things you can, the atmosphere and the gameplay are the things that make it great and not graphics. Still I think it looks quite good, there is a lot of detail in it.

i prefer MP5 red tiger camo with a silencer and deagle, faster reloading, bandoiler en 3 stun grenades
=> it's very good for the rambo type of killer, just run in and try to kill as many as you can and mostly you'll get 5 kills and then die

or

i go silent with M1... well the first sniper you have or .50 cal with UAV jammer, deep impact and C4 with deagle as secondary fire

and really, why do all u guys use martydom? it's kinda for noobs to get easy kills

1. uncharted
2. ratchet
3. heavenly swird

honourable mention: cod4, dmc4, mlb08: the show, warhawk

i'd go with vegas, it has both awesome offline campaign and co-op and as well a terrific multiplayer online whilist army of 2 is only fun in co-op (opinion of reviewers)