I think the crux of the matter is that there are so many things to be good at. Most people aren't any good at most things, so if you put a little effort it then you can be better than average even if you're not particularly talented in that arena.

Speaking of talent, another important point is that talent is overrated. You never know when you will break through from being average to good or great. People who write themselves off saying "I'm just not good at that" will never have the chance. The effort that the greats have put it in is always hidden to us.

So my advice is if you enjoy something don't worry too much about sucking it at.