I read once that your personality is pretty much fixed by the time you're 30. I am 31 in three weeks time.
Three weeks to change. Doesn't give me much to play with, does it.
Mr Naked Blog seems to confirm this theory, writing recently that it helps to be young to blog, as it's a time of maximum change, internal and external. Hopefully though, as age increases, so does insight and writing skill.
I've been set in my ways since the age of 5, anyway.