I enjoy the story mode and the Special Ops levels but the online play is crap in my opinion. Way too much clutter and the game play is way too fast (at least for me). If and when they come out with new maps I would like to see some long range terrain. Also, if they turned the Special Ops Survival mode into 4 player instead of two.... 
Problem is, if the weapons are modeled the same way as MW:1. They didn't accurately model the ballistics at all. There's one server on MW:1 that has maps with actual distance on them, after about 4-500 meters the bullets just stop. They don't drop off, there's no bullet drop at all, they just stop.

It's very frustrating having a weapon that can effectively engage targets at over a kilometer, being restricted to 200 meter by 200 meter boxes of close quarter nightmares, and when finally given a map with adequate range to use the damn gun. The round just disappears halfway to the target.
I'm also continually frustrated with move-speed with sights-up on weapons like the M4 being as ridiculously slow as it is. I can move at a decent pace while aiming with an MP-5 and iron sights; but not with an M4 and a reflex sight?
It's almost as bad as the glaring balancing that DICE did with weapon recoil in BF 2. Model the damn weapon with what it's capable of doing in the hands of a trained operator in the real world. (Y'know like what we're supposed to be ingame.) Not as wielded by an asthmatic 12 year old who's 80 pounds overweight. Nothing infuriates me more than seeing someone open up full auto with an AK-47 @ 200 meters and having the same accuracy as an M-16.
After MW 2, I was done with CoD.
As far as the BF series goes... their only good game was 2142. Because that's the only game where they couldn't F*** up real world weapons and capabilities for the sake of "balance". 1942, BF 2, and BF 3 are complete crap IMO. Nothing infuriated me more in BF 2 than firing point blank into the rear of a T-series tank... what'd they use? The T-80? With an Abrams and not instantly turning it into a scrap heap. Or worse, him being able to kill me after the mentioned rear-shot on him, because he had someone with a blowtorch zapping his treads.

My Shooter of the Year goes to Space Marine. Because I don't need a gun, I can just jump in with a Thunder Hammer and smash things into paste.
If you're going to have ridiculous capabilities. Do it in a setting that doesn't crap all over what real equipment is capable of.