I'm 5'7" and very much into tall women. in a way, it does make things simpler, because short women and women who wont date shorter men are automatically filtered out, leaving more time to focus on that most important category, attractive women who will date me. not that I think a woman shorter than me is necessarily not attractive, but for whatever reason 90% of the time it seems to work out that way, though its not the result of a conscious process.
anyway, my SO is a few inches taller. We don't make a big deal out of it. Nothing more fun to me than blowing up some social expectations, so I love it. Not that there are many expectations for relationships in the SF bay area, we are actually quite vanilla as a natural gender, monogamous hetero couple.
Nobody we've met has seemed surprised or mentioned it. I think the relationship is all the better that it doesn't start with the pretense of me being some sort of protector for her. I prefer an entirely mutual relationship. The only physical issue is sex standing up
but even that works with a porno prop. ;p It's good.