All depends on who you are playing with, and where you are playing. I love Desert Combat, but I love flying Helicopters the most ( or being a gunner in one ). I leave all the jets alone except the Warthog as I cannot fly them effectively. Support roles in both Classic BF and Desert Combat are fun. I love laying mine fields, setting booby traps, and calling in fire. Sniping from long distances is always fun, because it frustrates the heck out of people when you snipe them and they can't find you after dying 3 times, and they respawn at the same location JUST to find you and kill you
I of course, do not like to base camp as I think it is cheap, unless of course, all points are taken and the base is the only place to find the enemy.