Depends entirely on who you ask of course. But for the sake of joining in, for me the perfect female would be:
Looks: My height (6’2") or a teeny bit shorter. Quite thin. Back length straight black hair. Pale skin. Grey eyes. An enchanting almost-smile.
Personality: Somewhat quiet but at the same time confident and playful, especially with those she knows well. Dreadful tease, and able to take the same. Intelligent and inquisitive mind. Shares something of my slightly strange sense of humour. Can enjoy just being together without always having to go somewhere or do something. Loves most or all of: books, 'puters, strategy games, dragons and lizards. Isn’t fanatical about appearances. Likes cuddling. Kinda relaxed attitude to life: doesn’t stress over everything. Could be described as generous and sweet.
Disclaimer: all of looks and some of personality doesn’t count for all that much, and I reserve the right to inexplicably fall madly in love with people that are the polar opposite of everything on the list above. 
