Only thing I really sucked in was languages. I was really good in English and Dutch, but I just sucked in French, Latin and Acient Greek...German wasn't good, but wasn't bad either
History. grade 10 history is the only class I ever faled a test in (I think maybe I passed one test all year, that was only like a 60), I ended up with 70 in the class (my lowest mark ever). I never took history again!
I wasn't bad at any particular subject, but I had trouble doing well in classes when I hated the teacher, and I often ran into teachers that I disliked. (Not my fault, they were objectively incompetent.)
Mostly math and phys.ed (except Badminton), I disliked chemistry, mainly referring to what Ardsgaine said: the teacher seemed to have got its diploma in a Cracker Jack box . Got a few "unforgettable" math teachers like that too...
I already finished Calculus III but don't have Rhetoric II finished. Guess which one I don't like. I hated PE because I'm about as athletic as Frasier Crane (I could beat the crap out of Niles, though ), but it wasn't a hard class, 90% of the Fs were because people didn't change into their gym clothes. I also had a quarter off of PE my sophmore year because I broke my arm in class playing a game where I would up running backwards and fell and used my arm to break the fall. Ouch.