I'm always happy. Maybe because I'm not a worrier, I've always had a happy-go-lucky nature, and I seek out the things that bring me pleasure. E.g. I like a good laugh so I mostly watch comedies, I love to sing, so I have singalong music around me a lot of the time, I do the things I enjoy, I spend time with people who make me happy, I do a lot of hobbies that give me pleasure. I guess I often feel on a natural high from all of this.
Of course negative things happen to me - I have a possible life-changing condition that's under investigation at the moment which they are fast-tracking as it could be urgent, but that doesn't stop me being happy right now. If the diagnosis happens then I hope I'll find the most positive way to deal with it. There's a bright side to everything, if you look for it.