When I was younger my best subjects were English and Math. Nowadays I really struggle with the math stuff. I'm dreading the next math course I have to take...am putting it off until the spring.
My favorite courses are anything related to Ethics. I really love exploring the gray areas and the fact there is not a clearly defined answer to many of the problems presented; solutions are no so clear-cut. I find it fascinating and love to discuss this stuff. 
Technology I find fascinating too. Not so much the techie stuff anymore (I quickly learned I stink at programming!) but rather the societal impacts it has had. I did love the troubleshooting and repair classes though, those were fun.
I still do love English and writing too, but they aren't part of my degree program anymore. I'm thinking about taking a creative writing class for fun some day.