Make sure you can swim pretty well. Kayaks tip over easily, and they're fairly hard to get back into after a capsize. Most kayaking deaths are from hypothermia after a capsize.
Which is why eskimo rolling is prolly a good skill to have if you kayak in white water?
I have only kayaked twice in my life and only in calm water. I watched people did white water kayaks though and I found it fascinating. I don't think I would try white water kayaks until I am super good with kayak.
Nevertheless, I have tried white water rafting (twice) which is less dangerous than white water kayak. It was quite a thrill actually, although I have to admit that I was scared shitless both times
(Because although I can swim I don't consider myself a really good swimmer)
My first white water raft trip, we were in 6-people raft and there was one point where everyone (inlcuding the guide) got thrown out of the raft. Then we all swam like crazy to get back to the raft (I was the last one out of water). One of the biggest guys on the raft was so scared that he kept tellling us how he thought he was going to die.
Of course, the next year someone said, hey why don't we go white-water rafting? I said, yeah why not, it should be fun.
It's like childbirth, after it was over, you swore you would never do it again, only to find yourself wanting another baby a year after that (well, that's what my mother said anyway).
Jane