1) If you were an emote...
I'd be one with a manic glint in his eye.
2) Vanilla or chocolate?
Vanilla
3) What is your shoe size?
Big for an orc, small for a gnoll.
4) How would you get the cake?
I'd send my hyena to do the deed. Ideally, the hyena would at least get the cake and die on the return trip so that the next hyena could carry on the last one's task. So on and so forth until I either get the cake or remember that I don't like cake anyway.
If the hyena(s) died on its first trip through the spiky death tunnel, I would have to fill the tunnel with still more mangled bodies until the entire thing was filled with rotting carcasses. I would then use my knife to dig a macabre tunnel through their corpses and reach the cake safely.
This is, of course, assuming I a) must get the cake and that b) Edward is not around to use telekinesis.
5) If you could go back in time and punch somebody's lights out, what would your witty one-liner be?
Canawful-gnevil one, Nazism zero!
6) At what temperature do you wash your underwear?
At room temperature, with magic.
7) Finally: it's over 9000!?
Hydra!
Sorry about symbols if I missed any.