I wonder if it says something about me that the only reason I'm playing Pokemon Diamond at all is because I think Dawn (or Hikari, if you want the Japanese name) is very, very cute.
It's the hat, I think. I don't know what she's like in the actual anime, being that I don't have a source for it, but just looking at the fanart makes her seem so adorable.
Of course, I tend to treat games as a significant collection of plot and dialogue interspersed with irritating but sadly unavoidable gameplay, so this is not unusual. I suppose what I'm really looking for when I buy a game is an interactive CG movie, preferably anime-style with cute girls.