I bought ARMA 2 at release and played it for about 3 weeks or so and haven't since.
#1. The bugs! Reading the forum this morning it seems alot has been addressed and thats a plus. However, the first week of having the game was spent troubleshooting and waiting for patches. It was a bit frustrating.
#2. The FPS. At the time i was on an e8400 o/c to 4.0, GTX 260 730/1600/1200, 4 gigs DDR2 pc-6400 , Windows Vista Ultimate and it was a struggle to get the game to play at a decent rate only hitting 10-15fps. I know the 260 wasn't the tops then but it was well below the performance of every other game i had including Crysis. Also frustrating.
#3. Online Play. Very few good servers at that time. Even when i found some to play in the hit reg was terrible.
#4 Communication. In game communication seemed lacking or nonexistent . Maybe it could have been due to not knowing exactly what to do but voice chat seemed MIA. I wont knock it for this becasue it may have been my error.
I liked the game overall and the gameplay style. I like action packed games but i also enjoy a game of patience and strategy. I was big on DF2 back in the day and hoped this game would feed my hunger for it again. It did but it didnt at the same time.
Having been away from Arma2 for so long i am ready to reinstall with the newest patches and drivers to see how it goes.
Also upgraded my rig since then:
Intel Core i5 750 oc'ed 4.2ghz
4 gigs Corsair Xm3 1600 DDR3
EVGA p55 SLI
Geforce GTX 260 OC SLI x2
WD Velicoraptor 10,000RPM
Windows 7 Ultimate x64
If i can hit 30-40 FPS with decent settings and view distance i will play ARMA2 again.