I believe what you are talking about, is not what I am talking about. We have not established a communication link. I accept the responsibility for being unclear. I'm not talking about emotions or inborn predispositions. Maybe I should be, but I don't think so, and am not. I am attempting to make an entirely different point. In the realm that I am talking about, it is not possible to BE an optimist AND a realist at the same time. It is is also not possible to BE a pessimist AND and a realist at the same time. Just to complete the set, it is also not possible to BE an optimist AND a pessimist at the same time. The three orientations are mutually exclusive at a point in time on an issue. (Schizophrenics, aside).
My answer to your haiku is, "I feel so gloomy", IS reality, realistic and probably true. The thought that you should feel differently than you do, is also a REAL THOUGHT and an opinion and a judgement, which may or may not accurately reflect reality. Which is more realistic? It depends on you.