DRMBM is fun. I just got done playing it a few minutes ago on the Sonic Collection game.
As for Sonic Spinball... bleh. Just reading that name makes my head hurt. Never was a fan of it. -_-
Toe Jam and Earl - Awesome series! On one of the games (I forget which, though it's the one I played the most). I usually get u on the higher floors and find most of the pieces to the ship, but then I end up doing something stupid, and then landing on a small chunk of land in the middle of nowhere and no way to get off of it.
Bucky O'Hare - I used to play this game all of the time when I was about 5 or 6. I remember gloating because I beat it and my dad couldn't, though it took me hours to get past the last level.
Maniac Mansion - Also an interesting game. I played it until all of my people were locked in a room, couldn't figure out what to do, and then quit. Maybe I should pull it back out again.
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I'm not quite sure if it was ever really popular or not, but I also liked Ironsword 2 (I know that's not the full name) for the NES. I never did beat the 4 elementals at the end of the game.... It's very frustrating (VERY) but I always found it fun.
Princess Tomato for the NES is also very underrated. I swear about a year ago I hated that game enough to put it in the "Worst Game Ever" topic. After playing through it again, it's actually fun.