I'll always pick the hardest available difficulty.I always had. I'm weird like that. The most satisfying experiences I had while gaming always came from situations that were directly caused by extreme difficulty setting - having 30 goblins chase you for 35 minutes while you slowly try to smack them with your tiny shield, doing your best to save up your potions like they are made of liquid gold ( because you will sure be needing them when you come across something better built than goblins ), literally screaming of joy when you manage to split them up, if only for a minute - just so you can actually see what are you beating on ( hoping it's still those goblins and not your local innkeeper) - imagine, if you can, the pure satisfaction when you actually manage to outwit them ( I know, it's an AI, who can't outwit that. WRONG! you can outwit one or two, not 30 little sneaky f***ers who stick to you like they haven't eaten for weeks and who can probably beat you to death with their tiny hands in about three seconds. Playing on easy or normal difficulty, I would probably never got to enjoy these situations.
So no, I'm not one of those people who pick hardest difficulties just to rub it into faces of other gamers, thinking that makes them superior in some way ( what's up with that anyway ), I'm one of those people who would rather spend 10 months trying to finish a game and enjoy the hell out of it than blaze through it in 3 weeks.
But as I said, that's just me. I'm weird like that