Elder Scrolls V: Skyrim

With Oblivion I discovered late that leveling up my Major class also leveled up the monsters. I got pretty far in and had my arse handed to me. Some reward for leveling up. I checked out the Gamespot primer and learned that I should make my minor class what I wanted my major class to be, and seldom level up the skills from my major class. I redid everything this way and ended up with a light armor wearing, invisible character. I haven't finished since.

Skyrim is already ordered and payed for. IDK when I'll play it, though.