In answer to the "Vulcans - why?" quaestion, check out a DS9 episode (not sure which one) where Jake and Nog are watching people from the Promenade and a Vulcan chick goes by... my response was pretty much the same as theirs
My choice? Betazoids. I have a thing for women with big, brown eyes, and Betazoids offer more of the same. Plus that whole no-nudity taboos thing and the empathic mind-sex....