Maybe you've got the right idea. If you start out depressed, everything is kind of a pleasant surprise.
Sitting around a campfire last night with my Los Guys I came upon the following thought. I tried it out on them and it was received favorably, for the most part. There was, of course, a hater in the house, but I think I'm on to something. Am I wrong?
"Only the pessimist can be pleasantly surprised."
If you like it, feel free to use it. Like my preaching professor Timothy Warren once said, "If my bullet fits your gun, man, shoot it."
Some corroborating cogitation:
"The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. " - George F. Will