Like a lot of the people in here have stated, Gauntlet remains a classic for me.
I spent many an hour at the arcade playing it, getting stupid scores and hoping that my 1 credit would last for some time.
Then it came out on the home machines, and well... that was like hog's heaven for me.
Ended up getting the CPC version first, which, I will be honest, is probably gonna rank as my all-time favourite version of the game, if only because of the record-breaking games I used to have on there. Mind you, even as an 8-bit version, it was a beautifully accurate conversion.
But yes, mainly because of my own personal records (Longest game without dying - well, over 15 hours (the 464 overheated and crashed before I died); and highest score I ever managed on any version - well, over 6 million (and that was before I knew the secret of Mr Death). Plus, I beleive it was one of the VERY first games with a expansion pack released for it (The Deeper Dungeons). Please correct me if that last bit was completely wrong... but it is the first one I remember!
But i was always impressed by the opening intro for G2 on the 16-bit machines, as you zoomed into the arcade machine, and the fire-breathin' dragon.
Bring it back, I say, in it's pure form... On the PSP (that'd rock)