Usually start games on hard, i like to be challenged a little.
If a game seems too easy i get bored and wont be likely to finish it. Seems hard is a sweet spot for me with most games.

Pussy mode? That should be a reward for beating extremely hard!

I really only replay a campaign to look at certain vistas (Halo) or to quickly go through the story to keep it fresh in my mind (some JRPG's, Fallout). Can't do these on Legendary now can I :P

Normal mode. If it's too easy, then hard mode.

I thought I read that on your wall the other day. "sorry people, I have to leave the site, I'm taking a new step in my life". Am I confused?

If possible hard and very hard on a second playthrough if I do a second one. I prefer to die more and be little bit angry about that as to die almost never and get bored because of no real challenge which is almost always the case in games on normal.

I remember when I played Far Cry Instincts on medium and even easy to get the achievements for that (yeah you had to play it on every single difficulty). On easy I didn't even have to shoot to play through the game. It was pretty much running through the enemies. Not sure how that can make fun.

The hardest. Although sometimes is bad because you want to replay and the second try feels too easy. Especially if you want to plat some game that requires to beat all difficulties

First play-through is always on the hardest difficulty possible, in Thief I turned off everything but perma-death. On the second play-through I play either normal or the easiest difficulty to either collect trophies if the game is made well (I like to do it as a way of congratulating the developer on making a decent game) or just to have a lot of fun.

I wrote on my wall that I was leaving, but it said this:

Goodbye, VGChartz. The users here have been great, but I must leave you all. I will request a perma-ban soon. My favorite user was.... was... was... a magnificent user named "I'm not leaving for a while!"

I can understand that. Experience vistas and story to really remember a great game, that makes sense.

On the other hand, I think I prefer to forget vistas and story from great games, so I have a decent chance to replay and relive a great experience sometime  in the future.