I loved how in Carnival if you could time it just right you could keep shooting the lowest bear in the bonus level and just keep him going back and forth like 20 times. Also the elusive diamond that would appear in a dropped apple in Mr. Do. I think I only had it happen twice ever in what seemed like thousands of games.
I like ColecoVision best, but it had an unfair advantage, coming out a full 5 years after the 2600 and 3 years after the Inty. It’s really generation 2.5, competing with the 5200. But man, those arcade ports were so impressive, and the expansion module to play 2600 games made it the best of both worlds.