I bought a waterproof phone, and it has been a surprisingly useful feature to me. Not because of all the times I've dropped it in the toilet, or decided to do scuba photography, but rather the peace of mind I get from knowing I could fall in a pool at any moment and get out without a $600 fine from the phone company. Or that I can go for a jog and use it as an ipod even if it looks like it might rain. Prop it up in a corner of the shower and listen to news podcasts while I get clean.

Or, basically, I just don't have to think or worry about water or moisture at all. Never expected to appreciate that feature so much.