It really depends who it is. I hate to try to change people, but if it’s someone I have to deal with daily I may say something to them. If I was doing something to annoy the hell out of someone who cared for me, I’d want them to tell me. However if you tell them and they try their hardest to work on it but just can’t change that’s the point where I would try and accept that person for who he/she is. You can’t expect anyone to change their ways but you can always try to help them.