I definitely find certain accents sexier than others. I tend to be partial to people with similar regional dialects to mine (inland Southern standard American, it's called) and to many British dialects. Voice quality/tone also makes a difference. Everything I've read about dialectical preferences has said that we're predisposed to like the sorts of dialects/accents that we hear from earliest times in utero and early childhood, which is fairly understandable. Those would be the comforting, most familiar sounds.