Two people need to have some similar interests in life. They can't be so complete opposites that they end up butting heads every day. Unless of course, they share an interest in debating and that's what got them together in the first place. But a relationship can get pretty bland if you are uninterested in what your partner is trying to talk about/explain to you. But part of relationship also comes to making sacrifices, and maybe going 4-wheeling through mountains, or on go-carts and camping at the top isn't exactly your favorite thing to do(I can't see why you would dislike this though...) but you should make the sacrifice to do something your significant other(SO) likes. Let loose a little, and you can have fun doing whatever it is that they like.
I know that me and my boyfriend.. er ex-boyfriend, don't have all the same interests. He is more into that Scene/Pop/Hipster type music. Skinny Jeans, v-necks, band tees. That type of stuff. I think he really rocks that look and is SUPER cute in it. His favorite bands are Sleeping with Sirens, A Rocket to the Moon etc. Where as I'm more into that Punk rock category, listening to Green Day, Minor Threat, Hinder, etcetc and I honestly just wear clothes to wear clothes, you know? Sometimes I dress up to look nice, but it honestly doesn't matter as long as I'm dressed. I wont put on these horribly clashing things, but yeah, I'm not super fashion-conscious. But that isn't to say that I also don't enjoy the hipster/skinny jean/v-neck scene that he does, because honestly, I do. I'm just really up for putting all that effort into everything =/. Maybe some time though, hah. If he helps me(:
So, some common points on interest are good to have. You need something to draw you together. Something that despite all your odds and ends, fits up perfectly.