Op Flashpoint is good, tho (as always) linear. I haven‘t had the chance to play it online yet, tho, so I can‘t comment on that. One nice thing about OFP is that the damage is more "realistic". If you get shot in the foot you don‘t die, (well, assuming it‘s normal rounds) you just can‘t walk. Compared to other games I‘ve played, (like Rogue Spear) this is quite good.
Anyway, I‘ve never shot a real gun, so I wouldn‘t know how realistic the firing is in OFP, but it‘s a really good game.
As for Ghost Recon, it seems more like the R6 kind of game, directed at "action" gamers. That‘s just after seeing ads, so I might be wrong.
-Fred