What do you think is the hardest thing to change?

For me, it's always been my personality. Somewhere along the way, my humor became rather morbid, I rarely smiled, sarcasm was in every sentance, and I had some sort of superiority complex over other people. Entering a job, it was hard to not do these things and I became very fake. I had to work on my complex because, even though I'm a superior over my co-workers, my absence of emotion when explaining a problem to them makes it feel like I'm putting them down and making them feel stupid, which is not my intention. I'm still working on it because, apparently, knowing a few long words and throwing a bit of sarcasm into the mix plays with people. So far, it's just been a problem with males. Maybe a strong willed girl gets under their skin, who knows. But I'm working on it, trying not to talk down to them. My smiles are still fake, but that's more out of lazyness than anything else.