Most Helpful Guy
Personality is the most important factor although I would be lying if I said looks doesn't matter. We are still just humans and that's just how most of us work so in other words looks will always play a role but it's not a decisive factor. Also people have different preferences so what one might consider ugly someone else might consider beautiful.
Most Helpful Girl
Surely it depends if she's big as in 'a little extra to love'/'love handles'... or big as in 'baby whale'/'gonna flatten me if she sits on me'
doesn't it? I mean I dunno how I'd feel if I was a guy but I think I'd draw the line at 14 stone or so.