Zelma -- One of the reasons I worry about water less is because I know that there is a lot in the food we eat (esp fruit and veg, soups, etc). Also, it seems that the idea that we need "8 8 oz glasses of water/day" is a difficult one to trace the origin of and may be one of those "urban legends." See:
http://www.snopes.com/medical/myths/8glasses.asp
Some have tried to trace the original statement, and the doctor who may have made it spoke of liquids more generally and said that coffee etc could count toward hydration. In other words, yes, we need hydration, but that can come in many forms.
Please don't think I'm being anti-water. I'm not. It's VERY important to stay hydrated!
I think for a lot of people, water helps keep them full, provides a goal, etc. It's hard to overdo it, and does have tons of benefits! So why not drink if you're so inclined?
But if you don't want to focus on it, and are keeping hydrated, I think that's fine too.