You are going to live long enough and be able to reproduce with about the same probability all other things equal whether you need 3 hours or 10 sleep nightly.

You are going to live long enough and be able to reproduce with about the same probability all other things equal whether you need 3 hours or 10 sleep nightly. There's very little evolutionary pressure even if you would massively and hugely prefer one of those over the other. The kind of non-survival genetics that could be selected for in the modern world are those that make multiple women (nature can be pretty sexist) want to throw caution to the wind and have babies fathered by a man with some desirable attribute. I have no idea if this actually happens in reality with heritable genes. Eg do basketball players pass on a greater than average amount of their genetics (more children with more women) by virtue of being tall making them more sexually desirable to those who might become single mothers? Plausible, I guess, but could easily be utterly false. I don't know how you'd test it even in the absence of ethical concerns.