It doesn't take much play time to figure out how to become overpowered (OP). If you are a seasoned player, you can probably manage it in as few as seven to ten levels. So, it seems to me, the trick is avoiding becoming OP so you can enjoy the game longer. To me, walking around as an untouchable god gets old fast.
My current swordspell PC is playing on Master difficulty, is limited to light armor, no shield, only steel or Skyforge steel weapons, no archery, no backstabbing, and hard limits on crafting, enchanting, and alchemy. Surprisingly, I still hit 100 with enchanting, alchemy and smithing relatively quickly. I'm toying with the idea of dropping both alchemy and enchanting the next time around. Ultimately, I may even play without potions, though not yet.
I know there's the Dead Is Dead approach, but that's not what I'm talking about. If you limit your PC, please share your approach.