I'm normally really tranquil, shy, quiet, etc. When I play video games and have been losing online for a good amount of time (maybe 4 or 5 games in a row of just getting raped by pro gamers) I put the controller down and walk around really on edge.
Other than that, I really don't get riled up. Oh, grades. If I bombed something I thought I put the most time into I possibly could, then I get angry at myself but tend to withdraw and snap alot then too.