The easiest way to not become overpowered is to just pick one crafting skill to put perks into, or none at all. And if you pick enchanting as that skill, never make anything that buffs, another crafting skill.
Lets say you picked enchanting. You could still smith your weapons or brew a few potions, but never put any perks into it.
I am / planing to get all my skills to 100 and use those skills (some more then others, of course), but with out the perk aspect to the skill. 1st, i want a normal build (see how I play), before i have to power level to gain those skills
my other goal, is to explore the balckreach in detail, not do any quests per say (may be later, not in the near future)