Thats one tough question, I Can't really remember the time I was super happy... The top things I remember is losing virginity, being loved by my first girlfriend. Strange thing I can't remember anything that made me very happy in last 15 years ;/ Surely there was a lot of successes like graduating, winning competitions, getting good feedback on my hobbies, having sex with girlfriends but its none of these made me super happy. Guess love and friendship is what I need.
Best thing, there's a lot to look forward I'm still pretty young. I agree how some successes such as graduating, winning competitions, putting in work and finishing something you had put the time into are there. I think the best thing so far that has happened to me was actually discovering that I liked to hike and spreading it with my friends and family. I really want to go to the Grand Canyon.
Realising that I can form my own view of the world and not just copy what other people have said or done.
At the moment i wouldn't know. But i know that if i completely reboot that i'll be more happy then ever... Finally out of this addictive bullshit that f*cks with my brain all day.