I never really understand this. I've never met a person with strictly one or the other. If you like a guy who is hot but a jerk, hey. The only person who has to deal with it is you. If you like a guy who is like a best friend and funny and caring but ugly as sin, once again, it's only you who has to deal with it. It's your life, your choices and your happiness so just do what you want and learn from your experience
yes i do see it as a problem. lets say you stay with the person just because of looks. in 10 to 15 years are they going to look the same or after the honey moon stage. i dont think so everyone looks change over time. then what will you have/ nothing to hold the relationship together. thats where personality comes in to play. with out that connection it usually doesn't last.
It's dependent on how foul the personalty is , when you look at the world realistically there no perfect soulmate. Somebody is always going to miss some trait or do something annoying. If this person is abusive than don't do it.