Yeah Right

I am a young adult who is white and friends with a lot of people of color. Lately I have been getting the feeling that my friends are getting sick of me. They've mentioned that it's hard because I have a different sense of humor, etc. I love hanging out with my friends and now get pretty annoyed when I'm around other white people. I feel like I now notice the cultural differences that my friends do, but I guess I'm not quite there yet because I can't pinpoint precisely what it is. But I really want to know because I feel like I enjoy being around people of color more but don't want to annoy them like white people now annoy me. Can anyone tell me specific things that white people do that make it obvious that they are culturally different from people of color? Please do not respond saying that skin color does not mean anything because I am talking about culture, not skin color. Any help would be greatly appreciated. Thanks!