Physically
Pretty eyes, a pretty smile, nice curves. In that order. Dimples help A LOT.
( Flapjack I spay a little mare for you, Tue 16 Jun 2009, 14:52, archived)

I'd go with that- eyes count for a lot.
Never been too bothered about dimples- although it seems my previous girlfriends liked them.
( Lord Gnome, Tue 16 Jun 2009, 14:56, archived)