My first relationship was with a man much older then myself. We did marry and it was a mistake. Because he was so much older it made me feel that I was more mature (more grown up). Seems all kids want to rush growing up.
Over time the differences did eventually cause problems. Mainly that I did grow up and change while he was also changing (yes we do go through changes even in middle age *smiles*) I don't regret my time with him nor do I embrace it. It just was. Being with someone older means there are chances that one of the pair will move into a different phase of life that can cause problems is all. That can also happen even closer in age.
I have also dated a men younger then myself. I personally don't recommend it and don't ever plan to do so again. They just aren't in the same stage of life as myself. Great fun but not someone I can take serious.