Play to your strengths. A lot of the time I have a really short attention span, so the hobbies I've stuck with long-term are things I'm good at or I'm very passionate about (reading and writing, languages, criminology, photography, etc).

There's such a wide range of things you can do that it can take a while to find your niche, but if you get bored of one thing or just can't get the hang of it, keep looking and you'll find something eventually!