There are things that I'm good at (lecturing, pushing paper, talking about Doctor Who, cleaning bathrooms), and things that I'm not good at (drawing, playing the piano, speaking French, ballroom dancing).
There is another way to categorize, and this other way is often confused with the "good at/bad at" method, but it is importantly different: There are things that I like to do and things that I do not like to do.
There are many things that I like to do (lecturing, talking about Doctor Who, playing the piano, speaking French). Thankfully, I'm fairly decent at enough of them to keep me happy. There are, of course, many things that I'm not great at that I like to do. That's too bad, but that's life.
Also, there are things that I don't like to do (pushing paper, cleaning bathrooms, drawing, ballroom dancing). Some of them are things that I'm not that great at anyways. And one suspects that one doesn't like to do them because one isn't so hot at them.
And then there is that strange category: things that I don't like to do but that I'm good at.
Why I would I do such things? Sometimes it's because I have to. Paper needs to be pushed and bathrooms don't clean themselves. There is another reason, though, and it can cause problems.