For me, i would be a fairy, or elf. maybe a wolf with dragon wings and a dark red unicorn horn. Now that, would be the best!
Pheonix. Live forever, come back from fires and ashes, set fire to my enemies... Seems like a good life
Equestrian Pony, any would do. Mainly so I could date the Mane6. My old answer would be vampire before I realized just how much that would suck.
The pun! It hurts! :Boo: Tbh, i'd rather not be a fictional creature, but if i have to choose, ponies.
Oh god's Tarrasque! I would probably want to be a Drow or a Werebear! Because WEREBEAR! Need I say more?
I'd want to be a Wolfbrother! I can stay human, but see and smell and hear like a wolf, and communicate with nearby wolves telepathically. And in my dreams, I'd be able to be a wolf and hunt with the pack, or else just roam the realm of dreams as I wish (after mastering the Wolf Dream of course, since it's dangerous if you don't know what you're doing). Oh! And golden eyes. Just an extra bit of awesomeness. http://wot.wikia.com/wiki/Wolfbrother
Werewolf, werewolfs are awsome! but i would have light blue eyes a white pelt and fangs, like a bear.
I think i would be an Orc... It would also be awesome to be a Balrog... fire breathing, wings, magic and stuff... awesome