Nice guys hmm?
Lets be honest here, there is a fine line between being nice and being a push over. Self proclaimed "Nice guys" tend to let anyone and everyone walk all over them. Who the hell would want to be with someone that rolls on command? You accept people crapping on you and never stand up and fight back.

As far as a nice guy lacking confidence, not always true. What i do find however is noone wants to be with a weak person. Mentally weak people tend to give nothing back in a relationship and drain all the energy out of the other person. I consider myself a nice guy yet would still knock the crap out of someone that crosses the line.

So for all those nice guys out there.. be nice, not weak. There is a difference.