Mechanics, Electronics, Machines, Innovations! If it moves, has Gears, or contains almost any kind of tech i probably know somewhat about it and can usually fix it. (I just love tech <3.)
Tactics and Weapons in pretty much any form. Always had a knack for them, and while i'm probably not the best i can hold my own in almost any case.
Medieval Weapons Combat or SCA Fighting as its now called. I don't lose much.
That's really all i should say. After all, if i said too much you'd probably look at me funny. Just be assured that i am far smarter than i seem. (But then again who isn't hmm?)
((Also warning... I talk too much so you might have to tell me to shut up if i'm bothering you.....))
And worth every minute of the terror XD, totally altered everything with one letter... I must say that if this is any indication of your skill then this is going to be very fun indeed.