Kids are alright.. babies are a pain in the ass. The majority of kids I know bite, spit, are racist (basing this from being next to a primary school at my highschool). I have only been with a small majority of sweet, kind kids, those are usually my relatives though.
Teenages? Now, those are big kids with a selfish know it all attitude, sure they may have reason but they loovee to rebel, at least a fair portion of them. If you raise them right, then you can have a lovely sweet little pal that will grow into a fine adult.