My list could go on for ages. The remakes I'd like to see (not in order of preference, it's just the ones that come to mind right now):
º Super Metroid (keep sprites, just give them more animation frames for more smoothness, add 3D backgrounds, remix the OST for better quality; and maybe add one or two new extra levels)
º Earthworm Jim (1 & 2) (same changes as above)
º Baldur's Gate (1 & 2) (keep the same point of view, but update the engine and make the characters and environments 3D; what comes to mind for the engine would be something along the lines of the one powering Heroes of the Storm)
º Warhammer 40K: Dawn of War (keep everything intact, just update it to the DoW2's engine, that's it)
º Turok (1, 2 & 3) (update the engine, perhaps Frostbite or UE4, just something modern while keeping the actual games themselves intact; NOT reboots, but actual true remakes)
º Shadow Man (1 & 2) (keep the game intact, update the engine, characters / models, OST quality, maybe add a few areas here and there, some new secrets; but mostly just update the engine)
º Star Wars: Episode I - Racer (yes that game, I liked it, got a problem? Give me Racer on a modern engine, and maybe the ability to create my own pod racer, or customize existing 'canon' ones; add new tracks that have nothing to do with the movie and add new drivers. I know I'd love to drive a pod racer as Darth Maul on my bad ass black and red-striped racer with exhaust pipes on each sides. Just simply rename the game to Star Wars: Racer, skip the "Episode I" part and we'll be fine)
º Mass Effect (1) (still a good game sure, but it hasn't aged well in my opinion; the UE3 version it runs on was too early and ME3 looks like a game made two generations in the future compared to ME1. So keep the game intact and update the engine and everything that goes along with it, models, textures, etc; something along the lines of Frostbite, give it an authentic visual style similar to Inquisition; "authentic" to its universe that is)
º Perfect Dark (should I even bother explaining)
º Star Wars: Shadows of the Empire (loved the game, and would shit bricks if I learned it'd be updated with the graphics of Battlefront; would also probably need a heart transplant following my reaction)
º STALKER: SoC and/or CoP (shouldn't need much explanation, superb games would be even better running on an updated engine; their atmosphere would be unequaled)
º Alien Vs. Predator (1994 Arcade Beat 'Em Up) (keep it 2D, maybe add 3D backgrounds, update and reanimate the sprites, add new levels, new Alien variants, new playable characters, or make the existing ones customizable to some degree; but generally speaking just keep the game intact, update the graphics)
º Virtual On (I'd LOVE another arena-style 1Vs1, 2Vs2 or 3Vs3 VO game; by "another" I mean the original Arcade one, or perhaps Oratorio Tangram on the Dreamcast, just massively updated; giant mechas fighting each others on a modern engine with a more serious, grittier visual style to it)
º Twisted Metal 2 (shouldn't need to explain it)
º Star Wars KOTOR (1 & 2) (duh)
º World of WarCraft (yes, I would play it if it didn't look like it was made for the N64)
º Castlevania: Symphony of the Night (no brainer; just update the sprites, give some 3D backgrounds)
º Blaster Master (my absolute favorite on the NES, so I am biased; I know it's popular generally speaking but I doubt that it'd sell today. Still I'd love to see a remake; keep it 2D, add 3D backgrounds)
º Chrono Trigger (similar to what I have in mind for Baldur's Gate; make it 3D but keep the same point of view... although to be honest Chrono Trigger is such a timeless classic that, simultaneously I don't want anyone to ever attempt to remake it... still... I'd love it... argh!)
º Metroid Prime (to be honest I wouldn't be surprised if we do get a remake of that one sometime on the Nintendo NX)
º The Legend of Zelda: Ocarina of Time (I know right now that Twilight Princess is being HD'ed, that's indeed along the lines of what I'm thinking of, but I think they'd have to do even more; and in my opinion would probably be one of the best ways for Nintendo to show off what the NX would be capable of. I wouldn't be looking for a Zelda game that looks photo realistic, I do strongly believe that Zelda games need to have that style in them that scream fantasy; I'd only want the polygon counts on models to rival the likes of Battlefront, Order 1886 or Rise of the Tomb Raider for example)
And so on and so forth. I could keep going on about remakes I'd want for days.