That I've played (but again I can still find some games I still enjoyed on all of them)
3DO - I loved Twisted at the time though
Jaguar - Not too experienced with this I have played it, but there are some games I would at least play Tempest, Raiden, NBA Jam, Aliens to try out that I haven't played before on this system. The skiing game looks fun too, I think it is the same one that came out on the SNES.
2600 - I think since I got into video games after this system came out that is why I put this on my list, I'm sure for its day it wasn't that bad, maybe it was.
PS1 - Thank you Sony for muddy looking "3D" polygon graphics and not approving some 2D games to come out here in the states, still I had a lot of fun with it, Motortoon GP and KOF95 (first time playing KOF!) come immediately to mind.
PS2 - I just don't think I ever liked this as much as I should have, I guess having a modded XBOX besides the regular games just made the BOX my first choice.
That I've owned
PS1
PS2
32X - My mother wouldn't let me upgrade to a Saturn so this is what I got before I convinced her, I still had fun with NBA Jam, Star Wars, Doom, I even had the 32X/CD Frankenstein combo so I did have a couple of FMV 32X games, still wasted potential there but I see what they were going with at least in concept.
Sega CD - See above, I do have and still love the CDX, again I had a lot of fun with Aleste, Snatcher, Time Gal, Keio, which I still own all to this day, but wasted potential indeed
Saturn - I currently buy and play primarily pc engine, neo cd, and Saturn games and I love the Saturn, but the US release in general was pretty lousy and again lots of wasted potential, but there are lots of games I still enjoy. I've been playing Minnesota Fats lately on the Saturn (I think maybe Side Pocket 2 in Japan?), I'm terrible but I've gotten somewhat better at it recently
Honorable Mention to the N64, Gamecube, and Wii and the WiiU for a string of disappointments but since the N64 the Nintendo consoles have always been my third choice anyway (I do have a WiiU and not a PS4 or Xbone though). Beetle Adventure and Mario Kart 64 were two of my favorites that generation though, and I can think of some other games like Virtua Striker and Billy Hatcher on the cube, plus the compilations like Data East on the Wii I enjoyed as well.
I'll mention the Master System too, but since it was such a non factor in the US (in part to Nintendo third party licensing at the time), I never got into it too much, but I do enjoy some of the games on the system a lot.
For all my Sega hate listed, I do have to say I would put Sega in my top three if not my favorite video game company of all time.