I've always wanted to go kayaking across rapid waters, but have never gotten the chance to before. Have you done it before? 
Well, I've done some low level rapids before! It's really quite fun but it can be very dangerous
I feel you. Kayaks usually have closed decks, so I think I'd be worried about accidentally tipping upside down.
Which, actually, is super easy to do but there is a system in place for that where you flick off the protective covering so you can barrel roll out xD
Actually you know what, I think I'll just stick to fishing, lol. Less dangerous. You can still be in a kayak though.