Rainbow Dash: You spawn right in front of a mountain with some sand on it, and on the side of it there is lava. There are a bunch of exposed coal so basically you got infinite torches.
Twilight Sparkle: You spawn with some trees, if you go forward a bit there is a hill, and behind you is some ocean.
Fluttershy: You spawn right on the side a mountain with some snow on the top. On your right side of the mountain when you spawn there is some lava (trololololol). There is also one random floating sand block that you should be able to find, and also some very nice Taiga.
Applejack: You spawn RIGHT on a beach, and on your left and behind are some water blocks. There are some random floating blocks and a little overhang, a BIG desert with only one block of water, some cacti (not very much a lot), sugar cane, and a little fall to a water lake.
Pinkie Pie: Spawns you on a big beach, and in front of you when you go up a little hill is a desert that kinda stretches to one end of the map with some cacti. There is some sugar cane, and a big ocean.
Pinkamena Diane Pie: Surprise! (For those of you bronies who thought I was doing the mane 6) Spawns you RIGHT next to a birch tree (there are a few others though ：P). There’s a snow biome which leads into a mountain (with still snow on it) and some little overhangs.
Rarity: You spawn one block above a beach (yes, floating in mid-air). There is a flat beach and flat grass for you to build on, a gravel beach with four blocks of exposed coal right next to it, and to find that find a snow biome (: