I thought the CoCo was awesome even with the chicklet keyboard on the original F board; but no denying the available software for the Atari 400/800, the VIC and then later the emerging C64 were definitely more colourful and soundful
I was fortunate to be in a Computer Club with a lot of interesting folk including some very advanged engineers; we shared a "library" of all the CoCo software ever produced which prompted me to upgrade to a Disk drive, since it was all on disk
I had an opportunity to take a Timex-Sinclair ZX-81 out of the library and found it intriguing and cool looking - really tiny sleek machine!
I had an early PET with the tapedec built in and that was ablast too
I remember around the mid 80's sears started advertising the Atari 800xl as > 64k and I did a double take, just like that Sinclair ad. We all saw this technique again in the 90's with the drives; reasoning that 1k is 1000 and not 1024 HDD MFR's would inflate the spec - it's still debated I think.
Disappointments hmmm... DAK sent me a Gorilla Bannana printer - was a lemon, fortunately they exchanged it for a working Bananna Whatever happened to them? The DAK guy could really write up the tech to make you want everything, great talent.
Breaking the PET and one of my CoCo's was disappointing because I ruined some awesome hardware trying to connect the PET monitor to the CoCo - almost got it but the signal was compressed at the top of the screen.