I may be in the minority, but I say "no remakes", please. We just want our favorite games fixed to play just as they did back in the day, at the same low resolutions & aspect ratios. My personal list:
-Mechwarrior 2 & mech2 mercs: fix jumpjet issues for fast PCs, even on Dosbox. We want to see silky smooth framerates without increasing the difficulty.
-Outcast: fix it for fast PCs & modern OSes. Outcast 1.1 doesn't support depth-of-field, which is core to the art-style. GOG edition has music volume balancing problems to the point of being unplayably annoying.
-Baldur's-Gate 1: fix the ambient music not loading or looping on fast PCs, and the graphics framerate problems on new video cards (applies to Planescape-Torment too). BG-EE is not BG1.
-Grand-Prix-2: Runs either too fast or too slow to be fun on modern PCs, even in DosBox. On 600MHz PIIIs, it was juuust right.
-XCom 1: None of the countless ports or editions give the satisfaction of playing UfoGold on an old pentium 2 or 3.
-MetalGearSolid 1: Fix it to work on modern PCs.
-Someone asked about system-shock-2: try the newdark engine with the graphics mods. They've done an excellent job of making it run perfectly on new PCs with such subtle improvments to the textures that don't alter the original style or feel.
-Agreed for mechwarrior 3.
-The only essential "remake" I can think of is adding speed adjustment hotkeys to Command and Conquer 1 & RedAlert 1, Starcraft style, rather than going into the options menu to do it. It was tedious.