Spending 66 fucking hours playing FF XIII before finally giving up on that piece of shit game. I was on the final act, and I realized that I actually wasn't enjoying myself.
Biggest gaming secrets? I fly through games like no-ones business, which ends up in me spending more money than I'd care to admit in order to keep me going. Seriously. I beat Ninja Gaiden Black on Very Hard, in two days, and I just bought Demon's souls, and I've already killed 8 bosses. In two days.
I'm also a masochist when it comes to games. The harder the better, within reason. In fact, I think that this is part of the reason I go through games so quickly.