When nobody likes you?

I guess that means there is something wrong with you, right? Well, maybe not nobody but many seem to have a problem with me. If it's personality, does that mean I should change it to accomodate to people's needs? Im not unfriendly, I just have some strong opinions and If you dont like them is that my fault? What do you do when people don't like you, should you try to be 'nicer'?