Being myself, the eldest son in my family, and yet the 2nd youngest in my generation I am at the point where I can see both sides, with enough clarity to be at least somewhat impartial
(And yes, that makes me really quite young in comparison to alot of you, don't make an assumption I will simply proove you wrong if you do)
Kids, yeah sure - its a gift and a privilege to be able to bear and raise a child but for gods sake, as has been mentioned before, the idea is to give the child a better chance at life than you yourself had, to pass on less crap and make the world better for them.
Alot of the problems with fucking annoying shitty kids is the way they are raised, almost entirely. (Exceptions do apply, though they are rare and far between)
For example, myself and my younger brother where raised with the steadfast beliefs that you "Do un to others as you would have them do un to you" and "Every action has a consequence" which are two core things that I simply see missing in alot of people my age and older even.
Something else is that I was never treated like a child, in the sense that if there was a problem when I was younger for any reason, my mother/father would simply sit down and explain it to me like anyone else - none of the goo goo gaa gaa bullshit after you can start to think for yourself (I can't remember exact dates, my memory aint that good)
On the topic of actually being able to cope with them? Mostly, younger children and I get along really well, although I recognise personally, I don't have the patience to be around them for rather long as my temper has a tendency to snap after the fifth-sixth annoyingly silly joke kids love to play thus I don't want to try and put myself in a position where I would do something stupid and endlessly regret that for the rest of my life.
That may change, people say you mellow with age... but hey, I have enough time to completely flip and become a pathetic soft teddy bear for all I know... which if you believe Hitome I am anyway XD