Do u have to have things in comman with ur partner?

So my partner and I really like each other and we have decent conversation and I get the things he is talking about but sometimes I don't feel we have things in common but yet we like the things etc but just they we were experience emotionally different he is the sun and I am the moon lol but I really do like him I just worry that if we get married we won't be able to converse with each other. But sometimes I think maybe opposite to who I am is good but how long will it last?