I'd like to offer as an example Mr Steven Tyler, he looks like that Iggy Pop puppet off the adverts with a hangover, yet his daughter is, in a very classic sense, tremendously beautiful. Picking and chosing just doesn't work.
I'm short, bald and wear glasses, so I'm pretty sure I'd fall well outside the bell curve of physical desirability in the theoretical sense, but I like to think I've done OK with the shoddy piece of clay I was given and, let's just say, I've done very well for myself because, unless we're after 'trophies', we're not that bothered and probably place more importance on environmental factors; sense of humour, humility, confidence.. etc.
You could have a 'perfect' looking chid, with musical talent and a genial brain, but who was so doted on by thier parents for being so 'perfect' that they were an arrogant little prick, never to hold down a meaningful relationship because they were so self obsessed and so, never to find real happiness.
I'd just want my children, when I have them, to be happy, to make the best of what they have.