I think that your question suggests answer... Personally I prefer Green Land too. Eastern Europe, like in ArmA 2. I play OA mainly due to many improvements, I don't like this desert stuff so much, however it's not something what I don't like very, very much ether.
(O.o)copy the bunny into your sig
( ><) help him achieve world domination
The last option is unneeded. It just messes with the first two.
But I voted green land. One Takistan is more than enough. Chernarus was more "Vietnam'ish" and I love that.
Green land makes you uber careful and adrenaline rises. In the desert you just grab a sniper rifle and go fraggin'