Game....... great. Graphics....... good. Characters......... OK. And, you get the point!
I suggest you put it the easiest mode. Simply because if you want to waste one hour's worth of hard, tactical gaming in a 'one bullet, one kill' shot to the right area, then, go ahead, put it on 'Hard' for all I care!
I have given this game a rating of 8 because it's a decent enough game to be worthy of such a rating. But the reason why I didn't give it the other 2 is because I'm comparing it with Call of Duty: Modern Warfare 2, and, believe me, it's a blood-bath! Modern Warfare 2 wipes the floor with it! Much better graphics, more shootable characters, and all based on a real story! (Well, apart from the White House, or Whiskey Hotel, being invaded and blown apart)! Anyway, back to Operation Flashpoint 2: Dragon Rising!
The way you have to command your troop/squadron/group/regiment is slightly annoying in some respects and is very similar to Tom Clancy's Ghost Recon: Advanced Warfighter. In some ways it's good because you won't even have to fire your weapon in a whole (30 minute) mission! (If you use your team-mates and the controls wisely). In other parts, however, it's bad. For instance, when you command them to do something like 'Move Forward', then you get attacked all of a sudden, you fire and, guess what? They are in the way, and fire at them, either that or they will run across your line of fire (whilst you are firing), killing your useful team member, and giving your opponent(s), the upper hand in the current battle situation.
(This was my first ever game review, by the way)!