I've been running various games (old WoD, Call of Cthulhu, 3.5, pathfinder, iron heroes, mecha d20, BESM, shadowrun, and a few others) since 2002 and I've more recently been making an honest attempt at making maps that don't look like something from the NES era (my last pathfinder map was literally referred to as "that zelda-looking map"). I'm starting to take a look through the tutorials now and we'll see if I can't produce something in GIMP soon.