I am just starting to understand this feeling -- both with a real Amiga 500 and with UAE on my "Pimiga" -- and oh, man. There really is nothing like it, aside from maybe programming a Lisp Machine.
I was sadden to have gotten a 386SX instead of an Amiga, like everyone else on the group, in retrospective my parents were right in sponsoring a PC acquisition instead of the Amiga.
However our "demoscene" gang used to spend weekend, mostly saturdays, where the Amiga owners would bring their computers into someone's place.
Then we would have a mix of ProTracker or Assembly coding sessions, and some gaming to relax as well.
oh man I read those as well! Nostalgia overload right now.
It's one of the best Amiga demos ever made running on a machine with a 7MHz CPU and 1MB of RAM.
Later, I moved on to doing realtime graphics in DOS, first with Turbo Pascal and inline assembly (reading Denthor/Asphyxia tutorials) and eventually C and although I have fond memories of that period too, the Amiga will always remain supremely vivid in my memory. Utterly unforgettable.
The meaning of life is to become a legend: https://www.youtube.com/watch?v=jziQBWQxvok