Personally, I'd find something like Art awful, and I know I wouldn't be able to get a good grade in it. Well, there's no way I'd get an A*, or an A most likely. And I wouldn't enjoy it either, I can't do art. I might be able to get a C or something, but nothing higher, I'd think. However I'm sure during the 2 year course I'd improve, but y'know. However, I know some amazing artists in my year, that love and are really enthusiastic about it.
However, I'm more of a sciencey/mathsy person. I can do Maths this year with no major problems, and the same with Chemistry for the most part. I'm not saying they're not hard, cos parts of them are, they're just not very hard to me. But equally I know some people who can't stand maths and would never do the A-Level in a million years, and only did the GCSE cos they had to.
So, I'd say Art overall personally. But out of the GCSEs I did I'd say Literature-well, it was my only A for a start (though I've recently realised I probably could've managed to get an A* if I'd put more effort in and thought about it more), and I didn't enjoy it too much. But really, I'm not going to vote as everyone will have different opinions on the matter-I'm sure there're some people on here that could get an A* in Art GCSE with no problem, and others that would struggle to even get a C in maths.