Dh and I are a lot alike in terms of our personalities and our goals in life, but we are completely different when it comes to hobbies.
I'm really social and have a lot of friends, while he doesn't prioritize that in his life. I like movies, reading, museums, the outdoors (hiking, biking, etc.), board games, travel... he doesn't like any of those things (although he's come around on traveling a bit).
He likes golf, fishing, and boating, and those are not things I really like doing so much.
Still, we're good about tagging along with each other on these things, and we always have fun together regardless of the activity. We do both enjoy spending time with our dogs, working out, dining out, and some other things... so that's good!
I don't mind that we're different in a lot of ways... it always keeps things interesting, and I learn about various things I never would have otherwise.