Music... I have been exploring the music I grew up with in greater depth. Reading books about it, downloading old shows, etc .... You mentioned hippies... Grateful Dead is a never ending source of interest and inspiration.
Cycling... That gets the endorphins pumped... I like them even more than the dopamine.
Skiing in the winter, Whitewater canoeing in the summer. I don't rock climb and I am probably a little too old to start, but who knows. I promised my wife not to sky-dive. Darn...
All that, but............. I have had to go through a change in expectations... It's different. I like it just as much, sometimes it's better, now... but I didn't get there in my first 6 months. Keep searching, you will find what you need.