Same age, same experience. I also remember when years later I first started really using Windows and an IBM PC at university - they were already 486DX2 at a whopping 66MHz, but the UI still felt more sluggish than my 7MHz at home.
Computations, on the other hand, were incomparably faster.
A bit younger (I was in my last year of primary school when I graduated from the C64 to the Amiga 2000). I fondly remember reading through the back of the Amiga 2000 reference manual (the ring-bound one) on Christmas day. It had schematics and everything! (back at that age, schematics just LOOKED cool - I couldn't really read them as such).
I remember those $5 shareware disks you used to be able to get at the markets.
By the end though, several years later.... Oh man.... Games weren't as smooth as on the Amiga, but OH THOSE SIERRA VGA GAMES ON THE PC!!!! Especially compared to their horrible Amiga ports (which were also Sierra abandoning the platform.... the port of King's Quest VI that was done by Revolution Software shows how much better they could have been).
They had shareware disks bundled with magazines. I knew someone who worked at the magazine shop and we would slide some out to copy them. It's amazing how now I can get any software so easily.
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.)
Computations, on the other hand, were incomparably faster.