Good on yer yenners. Happiness is where it's at!
I used to think sadness was my default state (yes, it's true, no violins please!). That was my 'absense of other emotions'. No matter how hard I tried to be happy, it'd never stay and I always seem to end up dejected again. That's how I saw my world.
Now it's an ebb-and-a-flow. Happiness can only exist (or be acknowledged anyway) by the contrast with unhappiness. You have to go through one to experience the other. I also realised that I am reactive, I respond. I am not by default or statically 'unhappy' any more than I am 'happy'. These are emotions that occur as a result of many many different factors; some I can influence, most I can't. But they flow through me but are not me. I am someone that can be both and all points inbetween and outside. Go with the ying, the yang, and the yen.... ride fixed (sorry, the last bit is me being facetious with myself!)