This has got to be one of the best options, seeing as most of the ones it ends up with would be cool if everyone could do.
EggWiemer
THIS WOULD BE AWESOME.
jonnyt_
Except there are a lot of bad options on this site too.
JonThompsonsEmail
Perhaps. Becoming a unicorn would give you magical powers and becoming a pegasus would give you flight. But an earth pony? All they get is pity. ;)
Either way, you'll be a freak (seeing as talking colorful ponies are not normal in real life). The unicorn might be worth it. The pegasus I'm a bit more dubious. Earth pony - that would suck.