Original Assassin's Creed - bought the second game and knew I'd never touch the first again once I played the second. And I was right!
Lately I've been trying to finish a lot more of the games I buy and there's been a few. Yoshi's Island DS, Goldeneye Rogue Agent (yeck), Halo, Kameo, GTA4, Comic Jumper, Splosion Man, Sonic 2, Monkey Island 2. Some of those were pretty good overall and if I were 12 years old again I probably would have taken my time and enjoyed them a bit more.
I don't have a preference for inverted camera or regular; it generally depends on what I've been playing lately. So if I jump into a new game and I was playing with the camera inverted in the last game I played, I'll invert it.
I have a tendency now to allow achievements to change the way I'd normally play through a game, alter the choices I'd normally make. :/
Edit: okay, I take off all the stickers too. Also go the wrong way whenever possible just to check whether I'm missing anything, old gamer's habit I suppose.