Pretty good article on what may be wrong with us. Gets you thinking at least.
Warning: some adult language so if you are offended by that don't read.
http://www.pointlesswasteoftime.com/misery.html
Several other articles and interesting things on the home site, again warning geared towards a mature audience.
I hope I'm mature enough to handle it. :)
I browsed through it -- work is calling - it's making me miserable. I'll have to finish later. :'(
That first one really struck me.
Fewer annoying people in our lives means fewer chances to learn to be tolerant, to get to know what makes others tick, etc. etc. Or to make good friends after you get over the "they're annoying" knee-jerk reaction. Which we've probably given to enough people without knowing it.
Which is, of course, the point of the second reason.