I agree with a lot of what Acadian, ghastley, and hautee have already said. I play on expert because adept seems too easy, yet master seems needlessly weighted against the player and I don't want to have to glitch/exploit to even the odds… especially early. All of my characters have been played did up until level 25. If they reach that level I figure they've earned their place in Skyrim and I remove the did restriction (yeah, that sounds better than saying that, like Acadian, i've developed an attachment to the character by then and I don't
want to see them die

).
Perking one crafting skill is the only limitation I impose on my characters.