These are by no means prerequisites for who I'm interested in, but they're are always plusses:
Craggy facial features
Sideburns
Redheads
Chest hair *but only if there's a good chest behind it, cannot stress this enough*
Agreed. For me it's not so much the features in and of themselves as much as what I can intuit about their character from them.
Historically I've only ever fallen for scrawny guys, even though that's not the physical type I'd typically be attracted to. Personality trumps all.
I'm secretly a girl