I'll never say never, but I doubt I would ever desire to buy another RCA Studio II. Everything else has at least 1 game I was ok with. I think a lot of the seldomly played stuff is ready to get sold off though. I got the stuff because I wanted to experience it and try it out. Well, that has been done so why is it still here? I don't have room for this stuff. Even if I get a house someday, that's a lot of dusting to do too.
I have grown unattached to much of my collection now. I almost wish I didn't have anything, but had a ton of money and could just fully enjoy things one by one. Then I remember how hard it will be to find a few of these and choose to keep the games at least until I beat them. I was more excited to get Atari games when I didn't have one and missed having the console.
I think the only one game I definitely care about keeping is the copy of Ms. Pac-Man for Genesis that my grandma who raised me and I shared. It's the only game of mine she really played and it brings back memories. I even sold it at a game store once, but the copy sat on the shelf for 2 and a half years and I was able to buy it back for cheap. I could tell it was the same one because of the way the cartridge rattled and the faint white crayon marking on the game's case.