I used to be the GM for the first 6 years or so that my group roleplayed. Then I went to college and someone else stepped up. Whenever I came back from college though, he'd be wanting a break from running games, so I'd end up GMing. Since college, it's been a bit more varied and I've actually gotten to play a couple characters for as much as half-a-year in the same campaign.
That said, I usually have more inspiration to run games than I do for characters, DnD especially seems to nerf my character creativity.
I'd say with all my RPG xp combined, I'm about 15th level DM, 3rd level player.