Corellia FTW. We 50's gotta admit that was one of the best planets for end of story. ;p. Along with Voss.
Dunno, Corellia seemed arbitrarily badly laid out, too much stuff too far away from either a quicktravel point or speeder, quests set as far away from each other as possible and way too many mobs in between. Almost like it was designed to slow you down just as you see the end.