Honestly, I think the best thing you can do is what my parents did. They both have their own "rooms" where they can hang out and do their own shit. When I was young my dad didn't really have one, but the family room was mostly his, and my mom had a "sewing room" where she could watch her vcr'd soap operas, have her sewing spread out all over, etc. Now my dad has a room with a big computer desk, computer/electronic crap all over, and a door he can close so that all the a/c stays in and the excessive volume on the TV doesn't bother my mom. She once again has her own shit, own zone on the a/c so she can be warmer than fuck, etc. And if either of them (ok, my dad) is lax about cleaning shit up, the other person isn't constantly stepping over it and bitching about it.
And of course they still sit together in the main room and watch stuff they both like, have dinner together, sleep in the same bed, all that. But if they don't want to watch the same thing or do the same thing, they just go to their room and no one gets butthurt over it. They are both retired now, and I'm convinced that is what has kept my mom from murdering my dad. I can't say if it would work for me (foreveralone.jpg), but it has worked great for them for over 50 years.