I acquired the mini "classic" editions of the NES, SNES, and Genesis. Large amounts of time on those will be dedicated to Tetris, Bubble Bobble, and Dr. Robotnicks Mean Bean Machine (all puzzle games), along with Zelda, Metroid, and Castlevania. And for once I'm going to beat the first Teenage Mutant Ninja Turtles game (it's insanely difficult, often regarded as one of the hardest video games ever) and Punch-Out (I need a patch so Mike Tyson can bite your ear off in this game and then spit it on referee Mario) (a game I've still not beaten despite having knocked out most opponents and tying or nearly tying a few record times).
I do wonder why though the Genesis was made to play Genesis cartridges, but the NES and SNES weren't, and really aren't that much bigger than the original cartridges.