Harry Potter (4th Year, 18)

You are Harry Potter, Boy-Who-Lived, abused orphan and wizard.

At age 15, while other teens were looking forward to only another couple of years of school, you had been told that 'Yer a Wizard, Harry', so now you're stuck in a magic school for another 4 years while your cousin Dudley and all his normal 'Muggle' friends and classmates will be free to do whatever they want after this year.

Granted learning magic was awesome, but it still pissed you off.