I have to agree. I grew up in a tropical climate and moved to the northern part of the northern hemisphere several years ago. The first few winters I would look like some kind of child lost in the wonder of the beauty of snow falling because I’d never lived in a place that had snow. Sometimes I still have those moments.

I am not a doctor, but it could be depression. It is really difficult to not feel terrible sometimes given the state of the world right now.

I'll add one more point.

Not just cause of age, but people disregard feeling when they don't find it comfortable with. People want to be treated in someway and don't want you feel in other shape or form.

Which is another reason why we tame/shape our feelings abiding by the social norms.

I used to be over friendly in my 20s. That behaviour isn't appreciated in professional relationships. I had to change my attitude towards people overtime and stop emphathizing with them, to a certain degree.

It is certainly a matter of environment and peers you had around you, not age.

Definitely agree. To your point on new things, I still feel that sense of awe and wonder when I go on trips to places I've never been, hear an awesome song for the first time, or even learn something new. It takes a certain level of motivation to feel those senses as you age (mid 30s here), and determination to seek those things out. I know I am lucky in that I'm at a stage in life where I have the resources to make some of these happen, but a lot of it is also forcing the free time to both seek out experiences and also be able to appreciate them.

I think one of the reasons people like having kids, is because they can see the world through there eyes. Everything you've already experienced numerous of times, they get to see for the first time and relay there joy to you. And you get to show them. Ignoring the depressing reality, painting a picture of the world like it once felt to you.

Yep. Each time you perform the same action, say the same words, think the same thoughts the connection of the neural pathways responsible for those things are strengthened. It is why depression and anxiety and other mental issues are so hard to reverse. It is possible though. I urge anyone who thinks they have depression to look up a book called "The Upward Spiral." It is co-written by a neuroscientist and a psychologist and was really eye opening for me on the inner workings of the brain when it comes to depression and anxiety and has helped me at least start on a path to making myself better.