I said England, Polynesia, Spain, Inca, and Egypt.
I almost always play Tall games, usually going for either Culture, Science, or Gold (and therefore "diplomacy") victories.
England: I don't like England, but I like coastal starts, and she guarantees me a coastal start
Polynesia: I get a coastal start, and if I'm anywhere near a peninsula, I get huge culture boosts which is fun because choosing policies is fun.
Spain: I usually get a coastal start, but it is so much fun to get a natural wonder in your vicinity for an awesome 2nd city.
Inca: They are fun if I get mountains nearby, simply because I like mountain ranges in my games.
Egypt: I like building wonders, it is fun to race people and choose which bonuses you get from them. Also, I love desert starts. Usually, it means nobody is near me (because of the bad desert) but I get a nice lush flood plain for my first 2 cities!
I would've chosen Korea instead of England if it were here, but it wasn't
EDIT: I didn't say why I would've chosen Korea! Going specialists is really cool, but I like it for the Great People. I don't like the Ottomans for that as much because I don't want the yields that much, and I also don't conquer people. And the Hwacha is just OP!
Also, though I love building tall empires, I don't like Gandhi. First, the building currently has no tooltip (IIRC) which confuses me beyond belief, the unit is still meh, and I hate the odd numbers for happiness we have going on now. 0.8 per person? -20% on Gandhi? -5% with the liberty finisher...
I can never predict my happiness anymore!