I'm on the side of differences in couples--not in core values, of course, and I think similar backgrounds can help...but I think it can be more fun if he goes off to play tennis while you go play Mah-Jong--come back together at the end of the day to talk about it. Take each other to the social groups that form around those interests.
As long as there are things that you do enjoy doing together, I don't think you have to be joined at the hip for everything.
Might even get a bit boring, no?
Have a great trip!
Me: 44 Him: 42 Together: 23 years; never married Bomb: August 1, 2009 Affair since May 2009 Walk away; no conversation; no process