I'm always a sniper on certain maps, and I usually manage to rack up a decent amount of kills. Ive gotta say though, Ive never managed to get to anyplace as cool as zerted's spot.
My personal favorite isn't a very hidden spot, but ive always been partial to the top of the hanger in Mos Eisly, you have a nice view of the entire city from their. Unfortunetly once you start sniping people usually notice your up there, and focus all their efforts on killing or avoiding you. So you've gotta stop for a while, lull them into a false sense of security before returning to your post.
Not being paranoid doesn't mean someone isn't trying to kill you... or does it?