Scientists currently speak of 66 unique, anomalous traits that water has - including varying density qualities, a large capacity to store heat and a higher surface tension than other liquids. It is a really remarkable substance when you get down on the molecular level.
I would propose a 67th anomalous trait - the ability to stress out everyone and everything that uses it - especially when there is too much or too little of it, it's in the wrong place, comes to us in the wrong form (snow, hail, etc.), gets dirty, is too hot or too cold, has the wrong critters in it, someone wants your share, or others want to tell you how to best use it.
It's managing this stress that makes man's desire to manage water so intense at times. Many claim the next wars will likely be initiated over water - not the normal political/cultural/religious differences we have or any other natural resources such as oil & natural gas, precious metals or gems, etc. It's hard to say if this will be borne out, as others argue for an equal probabilty that water differences will lead to cooperative solutions because it is so universally fundamental and unique. My guess is..., I'd better not say.
Anyway, I have a feeling we're not done discovering the true uniqness of water yet, or the creativity man will apply to manage it - for themselves or for you.