Good at many things/Great at nothing... Is this a common problem?

[meccaNES]

Something i've been thinking about recently is that i'm pretty good at just about anything i set my mind to (i'm massively lazy and it shows in my results). But, i'm not great (professional or world class level) at anything. And, my hobbies seem to change every couple of years as my interest change. I'm 22 above average intelligence and can't seem to just develop the magical drive or motivation that makes people amazingly successful at that one niche.

Maybe i just haven't found it yet or maybe there's some other reasoning? Too many interests maybe? I'm not sure. But i believe it's prevented me from succeeding in multiple fields. My most recent interest of course being poker which i'm sure i could be very good at if i can over come my laziness which i'm taking steps to do.

Is this a common problem? I mean i just beat an international master on icc (internet chess club) in a couple games of 3 0 (not that impressive as the time constraints allow for a lot of blunders) but i'll never be world class or probably even titled. I don't want the same thing to happen to my poker playing as i genuinely enjoy playing this game. Which is a first as i never had fun at much before.

Does anyone have this same problem or know a way to overcome it? Maybe this is too much like the "intellectual apathy" posts flying all over the place. But something i've had trouble with is finding that one thing that just drives me to commit my life to it.

When did any of you guys (if you have at all) find that one thing that is your life's work? Or just that one thing that you enjoy more than anything else? Is this something that can be learned, taught or come naturally?