In laws are just that, in laws.
They will always be different, they'll have different opinions, traditions and what not - just like any other family, they're just related through marriage.
Sometimes they'll like you, sometimes they won't and sometimes you won't like them, if you're lucky there will be love all round.
My MIL and me had our differences, but she was the same with most people - it wasn't necessarily personal, but obviously if things got heated, my DH would react (which she loved), since she passed away I feel guilt/sadness about the times we disagreed, but also I remind myself we were different people and her approval/love doesn't define me.
My FIL can be hard work on occasion, but he's also wonderful. He shows his love to my DH, me and my children differently (he's on the spectrum so processes things differently), but he is super caring and will always look out for us.
Equally, I love my parents but they annoy me sometimes too, my DH is confident and he doesn't give a shit what anyone thinks of him - and although it could make things awkward early on in the relationship - now out relationship is simple and there's no friction really, on the odd occasion there is friction, it's usually me and DH vs them.
Ultimately your relationship is what matters so in laws need to get on board and when I eventually become an in-law I hope I can be one that is liked, rather than tolerated.. BUT if we're different, I can't exactly pretend to be someone else - things will be as they are - like any friendship/family/relationship.
Not worth worrying about OP. X