I don't know how you rank that many games at once, but seeing Witcher 3 at #15 somehow feels wrong. I guess you could say it's a ranking based on the true RPG aspects, but that doesn't really explain Dark Souls being ranked above it. Witcher 2 is somehow 40 places lower than the original game? Dragon Age Origins is lower than freaking ELEX? You have to go 60 places to find the first Mass Effect game, and they ranked Dark Souls 2 above Dark Souls 3? Seriously?
I'm not sure if their opinions are bad, their scoring is way off, or if it was a waste of time to rank 100 games in the first place.
First things first, RPG Codex is a community of RPG experts as well as RPG amateurs, but all in all the ratio of experts is the highest of all communities. So you have here quite a few old guys (as old as me or older) who have played every great RPG from the 80's and later. Have you heard about Buck Rodgers? Pools of Darkness? Betrayal at Krondor? Dark Sun: Shattered Lands? Ultima? Wizardry? Well, these guys played them all so it's no wonder that games aimed at retards like Skyrim or Dragon Age or Mass Effect (with hand-holding, LGBTFAGS and other things for double digit IQ target) aren't high on that list.
Age of Decadence for example is a brilliant but underappreciated gem of a game that besides RPG Codex community no one has heard about and it deservedly got 11th place. You can be sure though that it wouldn't be considered in any other list like this made by mainstream media (like IGN, Gamespot, RPS or PC Gamer) because the game doesn't play itself and all of the negative reviews on Steam are of the "it's too hard" category. When a casual gamer goes from Dragon Age or Skyrim (where he easily becomes a demi-god) to AoD where he can't win even the first fight you can be certain that he won't recommend this game. But for RPG Codex the challenge and unique ideas in the game are precious, hence they prefer games like AoD or Jagged Alliance 2 or Fallout or Arcanum rather than Mass Effect, Skyrim, Oblivion or Dragon Age.
I agree though that some of the games on the list should be lower or much lower (like all Dark Souls games, Shadowrun: Dragonfall, Baldur's Gate series, Morrowind, etc.) and some higher or much higher (like Betrayal at Krondor, Dark Sun, Age of Decadence, Wasteland 1, etc.) but
the point of this list is more about pointing RPG fans in the right direction rather than trying to be alpha and omega. Look at any other top 100 (or whatever number they can come up with) and see how many great RPGs they've omitted and look at this list to see the difference. RPG Codex has gems no other list has and that's its main advantage.
Also, I should point out, in case you've missed it, how the voting looked like. Everyone had 25 points to distribute but could assign no more than 5 points to a single title. So one could vote on 25 games or only 5 games, depending on his choice. That way it was impossible to downvote a game you haven't played or you didn't play (and knowing RPG Codex, Bioware and Bethesda games would end up even lower in such case because their titles would get many 1 ratings). That way you voted only on the games that you thought truly deserved the spot. Hence Witcher 3 didn't get the better place because objectively it's a much worse game than Planescape Torment, Fallout, Arcanum, Bloodlines, Wizardry 8 (although it got better place but that's mainly because many more people played W3 than W8) or Age of Decadence.
Even more objectionable than that is the indie games and hipster type games, for me.
Like Expeditions Viking and Atom RPG. I enjoyed both. They do not belong in an RPG top 100. Neither does the first Neverwinter Nights. Neverwinter Nights II? That's a discussion. And Elex? No. Just no.
lol
Top 100 is a lot, Expeditions: Viking and Atom are easily in the top 100. NN is super boring, I agree and NN 2 got so many points only because of brilliant expansion Mask of the Betrayer. I don't know what you have against ELEX though, IMO it's a much better game than any AAA title I know but if you want a casual list just go to any other gaming site and voila, you will have your wishes fulfilled.