Slimy, moldy, rusty, too small, not a powerful enough stream, too warm, and generally just disgusting. Water fountains repulse me.
I wrote a post once about things that will be different 40 years from now. Well, here's another thing: water fountains won't be so disgusting. The current ones will be proven to be extremely effective at transmitting diseases and will be discontinued. Modern water fountains will one day be looked upon in the same vein as we look upon people in the 1700s shitting in a hole. Gross.