Are you any good at making/keeping one?
Depends on the commitment. If it's to do with something I love or enjoy doing, I can keep at it for a very long time. If it's something that I don't enjoy, I lack on it a little bit until I break it completely. Like back when I used to do karate - it was a lot of fun, I learnt to defend myself, and it's made me a pretty strong person today. However, not only was it expensive (like... very expensive), but I'd signed up to other things as well. Like I was part of my neighbourhood's football team and the neighbourhood wardens. Can't keep up with things like that all the time with school, family and other hobbies too.

Anything else about commitments you want to mention?
Not really. I'll come back to this.