OK.. So I'll divulge my cat's drinking strangeness...
She never has liked a bowl, but loves to drink from the faucet. I'll turn it on to let it trickle, and she does the sideways head deal.
I got her one of those water fountain bowls, but she didn't like it because after a day it just wasn't fresh enough I guess. I got tired of emptying it and refilling it constantly.
So now her bowl is a plastic cup on the dresser, just outside my bath. She will jump up and rub her face on the cup, telling me she likes her bowl, but it's not fresh.. CHANGE IT!!!... so I'll empty it out and refill it.
THen she can't just stick her face in it, until she has dipped her paw in it a few times, and licked the water off her paw. Only then can she stick her face in the cup and get a nice long drink....
Yep.. they own us...
(as a note, some cats will drink a lot because of health issues, such as diabetes. if you have any wonders a vet visit could be a good thing)