You were a shapeshifter.

You thought it was pretty fucking cool. Apparently a shitty old witch had tried to curse you, but she had mucked up the spell so bad that instead of cursing you to be a frog, she cursed you to be a shapeshifter. Ofcourse after you got over being so freaked out because you got cursed, you started to really enjoy your 'curse'.

Start the roleplay however you want.