For myself, I can't imagine wasting any of my time really caring how others say things. Sure lots of people say things differently than I do, but as long as their point gets across I don't much mind how they do it. I have very proper English, and I can speak like a hillbilly if I'm goofing around or what not, but it really just doesn't bother me. I figure so many come from such varied backgrounds that I would expect people to talk very differently.