I think pictures are more accurate because they are taken from angles other people see you at. When you look in the mirror, you can only really see yourself from the perspective of the reflected angle. You can never see yourself from behind with one mirror. Although you can with two. :)
Normal. I think my hair and outfits look better in a mirror, but they look horrible in a photo. I used to take a pic of myself in the mirror with my camera phone: if it wasn't photo perfect, I wouldn't wear that makeup, hairstyle, or clothes that day. I no longer do this.
i ALWAYS look fucked up in pictures. i wind up in weird poses or making odd faces that make me look like some sort of misshapen blob-monster (unless i'm taking my own picture, then i can usually get a few good ones).