yeah, but swimming is cold and it's too easy to flip over and just float on your back.
heh, heh. i mostly like running because you get the most bang for your buck. biking is awesome for the legs, but it doesn't do much for your upper body and is too weather-dependent for most people with "normal" bikes. swimming is cool, but doesn't do as much for your legs. of course, if you want to do all three you'll get an awesome all-around spanking ... and you could start training for the next ironman.