I know a lot of people would wonder what sort of psychology is behind such a match, and I have to wonder (in return) what it matters. The older I get, the more I think, be comfortable, be happy. If you have 'daddy issues' and want to marry a man to replace your father, if the man you find would make a good father figure (both to yourself and any children you may have), why not? If you're a young man with 'mother issues,' why shouldn't you find a mate that fulfill those needs?
If they're happy, so be it.
There's five years between dh and me. It rarely causes any 'issues,' for the most part, we're on the same page.