Bridge of Eldin is my favorite. I like flat maps and I also like having the bridge blow up. The great distance between the two sides makes changing sides really risky unless you can fly ridiculously far (I love Pit =D). Thus, Pit owns there when the bridge blows up. Even if I'm not him, the strategy involved in navigating the gap is still really fun. It's about as fun as fighting around the hole in middle of the Hyrule Temple map in SSBM.








