I think they're all relative, so I'm going to say all three.
Health - certainly nothing majorly wrong with me - especially when you think about how some people in the world suffer with various illness and ailments. My dodgy ankle from playing too much netball kind of pales into comparison.
Wealth - I'm not what you would call rich, but a look at any homeless shelter would soon remind me (not that I need to be reminded) that I'm wealthy.
Happy? Ditto the above. At this precise moment in time, I'm not especially happy as I've just played rubbish in a game of netball, but in general I have a good life, have family and friends and don't have much to grumble about!
So, all three for me.