I'm a gamer and I personally loved Crysis 1 and Warhead. Fantastic games, imo.
I bought Crysis 2 just because this game stands out of other shooters like COD for example, which hasn't got a engine upgrade since ages and is based on the 'shoot everyone you see' concept which made is popular among the younger players. It's a purely consolized game.
I've completed the Single Player campaign of Crysis 2 and I must say, I'm satisfied with the improvements in storyline and combat systems since the original Crysis. The graphics still are fantastic, though a grade lower than Crysis which still stands rock solid as the best looking shooter even after 4 years since its launch.
*One thing I'd like to mention is the lighting system in the game. It is absolutely fantastic, just like in C1. I haven't seen any other game that has such an amazing lighting system.
*I liked the sound effects in the game. The musical score by Hans Zimmer is the best I've seen in any game by far. Moreover, Crysis 2 empasizes you to use the Nanosuit powers to your advantage, something which was lacking just a bit in the original Crysis.
*Despite all those things that make this game great, there are unfortunately many areas where Crysis 2 falls short. I know that most of you must be aware of thess facts already but still I'd provide my own views on C2.
*I know Crysis 2 looks stunning but Crytek could've done a better job by providing us Advanced Options. High/Very High/Extreme... I mean What the........Never mind I'll pass on this one.
*Plus, there are low res textures (to cater for the consoles, obviously) and no DX11. The latter won't make a ground breaking difference, though but it cannot be ignored since it provides suport for Tesselation, etc and might improve performance on capable hardware.
I was glad to hear the DX11 Patch is on its way to the PC Community.
Lastly, the game is a little buggy for my liking. AI is sometimes all over the place and I've encountered many bugs like Nano Catalysts vanishing, etc. But I'm sure those will be fixed by the patches in future.
And for those who think Crytek betrayed us, the PC community, I'd say, NO! they haven't (Yet!).
Not upto our expectations? YES! but I think they'll learn from their mistakes because no one is perfect, sans Chuck Norris lol.

We, The PC Community, still are with you, Crytek, and we will be provided you listen to us and do not test our patience too much. Plus, we want more customisability and priority if you ever will make Crysis 3 because we are a generation ahead of the consoles at this moment.
FINAL SCORE: You decide on your own. I don't want to trigger any flame wars here.
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Thanks a lot, if you managed to read this all along, lol. I'm always open for corrections and suggestions in my writing.
Greetings.......from India....