Well as far as default maps go I like Remagen, Algiers, Destroyed Village. Stalingrad is a little cramped, but still good.
There are a few custom maps out there that I have been playing recently, that I think snipers(or any player would like), just for a change:
1. The Train Station
http://www.modtheater.com/pafiledb.php? ... ile&id=193
2. Urban Sprawl
http://www.modtheater.com/pafiledb.php? ... ile&id=196
3. Vervins, very good map
http://www.modtheater.com/pafiledb.php? ... ile&id=447
4. Sniper's Fury. This one may cause lag on lower end PC's but a very expansive map. The only problem is, if you go inside some of the buildings, you can't see a damned thing. Good thing I had my Night Vision Scope.
http://www.modtheater.com/pafiledb.php? ... ile&id=542