I'm a little older (46) and my first computer was a Vic20. That was followed by a C64 which I owned when the Amiga 500 was released and the difference was staggering. The introduction of the workbench desktop was jaw dropping compared to the relatively clunky Commodore Basic interface of the older machines. I couldn't afford one at the time so I only got to play with the 500 at a friends or in stores which probably made them even more fabulous - it was years before I actually owned an Amiga and that was the 1200. The next time I had such an experience was when I started using Sun Sparc stations connected to a network and the SunView interface. Great days.
First computer was a PC1211. Then I got an ORIC ATMOS and an Atari ST. Never really had a chance to play with an Amiga and couldn't buy it (a bit pricey - although maybe an other way to play that hand would have been to save the money spent in other computers to only buy the Amiga. But at that rate, I'd probably still be waiting for something better to come around.
"The Future Was Here" really got me to understand what was so great about the Amiga (because, the ST also had the Boing demo - but the sound wasn't as nice.)