I like to think that time 'seasons' people. I know, I feel differently about certain things now than I did when I was younger and friends that I have spoken with agree. I think as you age/mature, you realize that little things shouldn't wind you up so much. You learn not to sweat the small stuff.
So many things have happened to me in my life that have changed me (for the better). Even those bad things have left a positive impact in some way or another.
In short, 'time' does not change the person...but people change over time. if that makes sense.