I use butter for cooking because it's fairly cheap and coconut oil makes me feel sick. I dislike almost all other dairy products, except a bit of cheese in specific foods (I'm going to lose my Paleo badge for admitting that one of them is pizza). I don't know why but they just make my stomach turn. And cheese seems cause significant digestive upset for me too.
I don't eat legumes regularly, but I don't think they're actually bad for us, and would have no problems eating lentils or chickpeas every so often. And I do eat white rice regularly.