I've figured that with certain major skills that it makes it easy to level up. I'm currently a level 6, but could easily be higher. I've read that it may not be the smartest thing to level so fast using the major skills such as conjuration. Important skills such as strength get neglected and since the enemies level as you do, this is a bad thing. Anyway, I'm really excited about the potential this game holds and will have to learn to limit my gameplay so I don't waste too many hours.