Not wanting kids and not liking it when they behave poorly does not mean that you are 'not good with kids'. They are two separate things. I like kids. I'm good with kids. I don't want any kids. Ever. And I groan when I see someone bring a small child into a theatre, a restaurant, or any other closed public venue because 90% of the time they will make an unholy terror out of themselves and everyone else will suffer. 'Get them OUT OF HERE until they can behave themselves,' I want to yell at the parents. It's vile.
I respect the parents that have well-behaved children, and I admire them. And it's part of my job in a public place to recognize that it is a public place and there are certain uses for certain places. If it bothers me that children are shrieking and chasing each other in a library, that's their problem and I have every right to be annoyed. But if it bothers me that children are shrieking and chasing each other in a public park, that's my problem and I need to get over it. In the same manner, children who want their parents' attention aren't doing anything wrong. It's in their nature to seek out affection from the people that are, for better or worse, the center of their world. It's not the kids' fault that the parents are poor hosts and ignore you for them. It is a shame that the kids will probably turn out to be poor hosts in the future, though.
I'm child-free, and it infuriates me that strangers feel entitled to ask me things like "When are you two going to start a family?" and whatnot. It's better with younger people. It's worse with older people. That's true for a lot of things, though.
As far as kids themselves? Kids are great. They are easy to convince into silliness. I have to watch the sarcasm around them (I've worked most with little kids and they don't 'get' sarcasm until later) but they are almost always bubbly and friendly.
They give great hugs. They remember things that you said side-handed, figuring they'd forget. They are always thinking, and always learning. They get just as restless as you do on a glorious summer day while stuck in the classroom. There is nothing like the wholehearted cheer you can get from a classroom of little ones when you tell them we're going outside for today's class. They take you back to the basics of what you know, and while the "but why?" can be infernally maddening, it also makes you think, too. And you're always teaching them, and teaching something is the best way to know it better, yourself.
They're very good at surprises, both good and bad.
In all, kids are pretty great. I like other peoples' kids. I like them a lot. I can't wait for my brothers to have a few kids of their own. I just don't want any of my own.