Commodore 64/128, NES, SNES, Sega Master System, Game Gear, Genesis, Dos, and Windows 3.1, and early windows 95.
That's all I really need to say in regards to systems I call nostalgic.
I can try to name all the games, but many of them are lost in my memory, and others are rather obscure to the point I don't think anybody would get some references.
So to put things, games were my life since I was 2 years old. I mean, I was able to learn some games before my brothers finished reading the manual to them (plenty of them C64 or SMS games). And I wasn't half-bad either, considering my age. I mean, first time playing Mario (around 4 years old), I was able to beat the first 2 levels of world 1, and accidentally find the warp zone and jump to world 4. And the first RPG I was introduced to was Final Fantasy 3(6) which kicked off all RPG interest to date; but the first one I actually beat was Chrono Trigger. And adventure games, Space Quest and Indiana Jones and the Fate of Atlantis. Those got me interested in adventure big time.
I miss the good ol' adventure puzzle game times. Obscure item, another item, and one more. A -> B = AB, AB -> C = D; D goes into door, door explodes to reveal another obscure item seemingly useless at the moment, only to learn it's a Deus Ex Machina by the end of the game (like let's say, a box of chocolates makes you beat the big bad at the end). Eric the Unready was well known for such obscure puzzles like that.
But basically for a good portion of my gaming life, I was a Sonic kid. I had almost every Sonic game for the system, and they were fun. Especially the 2 player mode for Sonic 2.
I guess I was pretty good at puzzles too (especially cracking some copy-protection codes without the manual) sometimes by luck, other times by seeing a pattern. Stunts was probably my first real success. It was mostly car terms, and solving them like a crossword puzzle. Starcon 2, memorize some location names, recognize numbers, and wish for the best of luck (our starmap was short-lived, including the xeroxed copy).
And flight simulators, I would have to say, you can't beat the X-Wing Series. TIE Fighter being the first one I actually beat, training missions and all. That was one hard game (even on an easy difficulty). Ended as a 3rd-level Ace, and a 4th level Inner Ring Sith Jr. Lieutenant.
Oh yeah, and as for a policy regarding cheating in games (sort of an agreement amongst the guys in the family), we are not allowed to cheat in any game unless we have beaten it before legitimately. If we know how to hack into the (save) games, be sure to stay out of each others' save games.
Speaking of cheating; whatever happened to classic codes like (up, down, left, right) or the Konami Code? I mean, I know cheating is still frowned upon, but to take them out almost completely from games, even single-player exclusively? I mean, you have to hack into a game, burn a copy, just to unlock the ability to cheat. Or add in a line of code to make your own cheats, just to be able to cheat. What gives?
Interesting Factoid:
Thanks to enough Adventure Gaming; much of the time, I think like an adventure game combining ridiculous plans with obscure items, and sometimes they actually work. That's the amazing thing. Advantage to being a packrat I guess. I'm like MacGuyver if he were an adventure game character.