Thinking back to it, my favourites were English, Biology and Physics. And now that I understand it, I even like Chemistry. I studied the anorganic Chemistry for about 3 Months, and now, knowing about the basics, it's easy.
Physics was one of my favourites in the later years, because we learned all about the relativity theory, the quantum mechanics and that kind of stuff. Light speed, wormholes and time travel fascinated me since I was a child (I was a Star Trek fan when I was a kid
), so I am pretty sad that there is no subject like Astronomy in school.
I liked English because my English teacher really knew how to teach us. It was hard, but fair. And I think my English isn't that bad now. And I like the language itself. Sometimes more than German.
I didn't mind Maths, I hated History and Geography (I never payed attention to what teachers said in that subject - I have informed myself about Geography after school when I had time, because now I know that it's very important. Even the political actions, and that it's important to know what's going on all around the earth, but I still hate history, the only interesting things were vikings (heavy metal, eat meat, kill strangers, hell yeah
)).
So the only big gap in my knowledge is history.