I love water. Like, love it.
Alas, our city water is full o' death and destruction, so we have a built-in filter in our refrigerator. I like it straight from the 'fridge tap, chilled, but without added ice. Ice interferes with my leisurely sippage (and hurts my teeth), plus it makes me freeze my booty off, since the temperature never really breaks 60F here anyway. :D
This sounds terrible, but I can't stand water, especially bottled. Everyone says "How can you not like water...it's just water!" All I can think when I'm drinking it is: "Mmm...a drink that tastes like the inside of my mouth." I love naturally carbonated water, but it has to be ice cold. Otherwise, to stay hydrated I take it in the form of tea or splash something (anything!) into it.
City water here is fine. I like it from the tap. So a slight chill, as much as the tap on cold gives, or room temp is good for me. This time of year a nice glass of ice water is damn tasty from time to time.