He should be nice, loyal, romantic, husband material, a little bit conservative, not too masculine or feminine, pro-children and so on. Someone like Ryan Kwanten, Drew Roy, Chris Pratt, Ryan Reynolds etc.
I have to ask, is this really all that important to a lot of you guys? I know it's considered "hot" but I'd date someone with a 0.2 inch if they were just a really nice person + good looking.