I am mostly a happy, glass half full person. I have my down moments but they rarely last very long.
A friend of mine recently described herself as a “glass 3/4 full person”. I think that fits me too.
In my case it has been a combination of natural optimism and having a pretty good life. Not that I haven’t had struggles (a few of them recently), but overall good.
I’m generally pretty happy most of the time; but there have been times in the past where I’ve been quite stressed and have had anxiety. Life is very good for me right now, son successfully launched after college, no money worries, and everyone is healthy.
I’m happy.
I’m almost always happy. Sometimes angry, but that’s different than being unhappy.
I’m generally happy and optimistic and generally expect the best from people and am rarely disappointed. There have a been a couple of periods in my life where I was miserable mostly situational - but you couldn’t pay me to repeat 7th grade, first semester sophomore year in high school and the middle year of grad school.
No, not at all. I’m a naturally very depressed person.
I do a really good job faking it though- especially with my students.
I’m naturally optimistic and happy. Not giddy; naturally calm and at peace. The downside is I’ve had a difficult time admitting when I’m unhappy.
Glass? What glass?
I am an empath, I take on the emotions of what I hear and see and know. I can generally laugh pretty easily, but I’m not like those hallmark actresses who walk around with a big smile plastered on their faces. Remember that Duggar wife? She totally freaked me out. But I also don’t like hearing people complaining, especially about their aches and pains. I will have a tough time someday when that becomes a past time in the old age home.
I’m quiet, introverted, and I have a deadly serious face when not smiling (thank you, parents!). I’d describe myself as relatively calm and content. Others might describe me as “serious”. I do have an undercurrent of Waiting for the Next Bad Thing to Happen. Working on that.
When I think of Happy People, I tend to think of those gregarious extroverts who are always working the room — that, I am not — and I realize Happy People come in 31 flavors.
I like the glass 3/4 full comment above. I don’t think that is my natural state but I do work intentionally to add the extra 1/4 liquid to my usual 1/2 full glass.
I’m generally able to find happy contentment in each situation, I am good at nose to the grindstone, 'get ‘er done’ without whining about the unfairness of it all. I am not bubbly & perky, but I am, nearly every day, content with life. Even when life was in some bad spots, I usually could find some joy in nature.
But I don’t know if others can tell that, with RBF 
DH is much more glass half empty than I am, but I he would say I have a downer side while I tell him it’s pragmatism. If he proposes some idea or another, I can always tell him why it won’t work!
I am not demonstrative, but tend to run happy much of the time. I’m a social introvert (I like people and can talk to most of them, but I need a lot of alone time to recharge). I don’t smile that much, but I can be silly when comfortable. That said, I have suffered some horrible bouts of depression and barely keep my anxiety in check most of the time.