Interesting thought about the half full/empty water glass

[Kilgamayan]

You all know the phrase about how "The optimist says the glass is half full, the pessimist says it's half empty, and the engineer says it's a good thing he put half his water in a redundant glass".

I was lying in bed thinking about this, and I realized that when I'm thirsty, I want a lot of liquid in the glass to make sure I'm not thristy anymore when I'm done. If I come across my glass and find it's half empty/full, I'm going to be unhappy. I could say "Damn, it's only half full." But that sounds pessimistic to me. If I were an optimist, I'd probably say "Well, at least it's only *half* empty."

Suddenly the roles are reversed. Pessimism says half-full, optimism says half-empty.

Discuss.