This is the biggest part of life that people just don't get and has always bothered me.

I can't stand people that are always-positive and nice all the time. I know they are lying and holding stuff back --- but what? I'd rather be friends with someone honest than nice. At least I know what they are thinking, and thus actually know them. Some people would rather just go through life in a mask and insist everyone else wear one too -- something I generally refuse to do.