go_vols said Would you be able to date someone who's more athletic/competitive than yourself?
It depends on who he's competing against. If the guy doesn't rest until he's satisfied being better than everyone around him then there might be a problem.
If someone is constantly striving to improve themselves then that's great. There's usually room for individual improvement in an activity, and for me that's a healthy way to compete. Obsessing over what everyone else is doing seems inefficient. If you're improvements push you ahead of the next person then great! But the competition is really against yourself.
So yes, if the guy is super competitive but is sane about it then why wouldn't you want to be with someone who is achievement oriented? It would be a fun pairing.