The trouble with water is that it isn't likely to remain in your stomach for long giving you that "full" feeling. I think it is probably your reaction to the punishment of forcing yourself to drink water you can't easily take after each snack that achieves something for you, at least between meals. If it works for you, then fine, but I'd rather have a soup for lunch that'll take up stomach space and will not be gone too quickly. Usually keeps me going until teatime.
(A little concerned you may be flushing away good nutrients/vitamins too, not that I'm an expert on these things.)