I don't think I was responsible for the girl. I did the weird CD-gear things, and a few barcode/bullet designs.
Monster Hunter is interesting because there aren't too many big games designed around co-op play anymore... mostly all you get is single player with another player running around.
The difficulty of the game is another attractive point. While some people like the feeling of progressing regardless of how badly you perform in the game, actually having to get better at the game to get past a challenge feels really nice sometimes :)