you cant play Chernarus in CO? I'm sure I have/do.
As to the map, definitely Chenarus. Lingor would be lovely too. Eggbeasts Evo on Lingor is splendid.
Takistan, for me, is a bit "brown", dull and predictable although does have better framerates.
Some of my new and old 3d work
Chernarus all the way! More objects as far as terrain is concerned, and it's so much more interesting too. Not just hills and valleys, though I do like Takistan for other game modes "Patrol" like missions.
I really like Takistan because of the towns. Some of them are designed amazingly. It is a shame more servers don't utlilize the whole map of takistan, but rather just ramsan and batsam.
Chenarus has a great environment with woods and water, but I am not a fan of their towns.
I'd say Takistan. Domination just has that "Big army eat small army" thing going for it. And fighting russkies with conventional military gear just doesn't really suit it that well.
I currently host a Chenarus CO public server and much prefer that over Takistan. Like was mentioned earlier, it is much harder to capture a town on Chernarus than on Takistan. If the interest is great enough, I may be able to port Domination over to other islands as well. I used to have it on Panthera and that seemed a bit harder than Chenarus.