Just a bit of fun. I know there are many others, but let's go with the Big Two plus add in Pathfinder's iconic city as a darkhorse and Sharn for something a bit different.
Criteria...entirely up to you. I think favorite suffices, for whatever reason, be it just reading about and exploring in your imagination or actual RPGing.
If you have a different favorite, select Other and tell us why.
Why on earth did you skip Sigil? That'd easily have won if it was on the list. Absalom isn't even a D&D metropolis. That's like saying "Who is your favourite DC Hero? Wonder Woman, Green Lantern, Mr Fantastic or Superman" (Batman conspicuous by his absence).
Anyway, Sigil is the answer.
Absalom wouldn't have made a top 100 for me. It's a nothing-city even in Pathfinder, which is full of actually-interesting cities.
Waterdeep is just a creepy and unconvincing city, that hasn't been cool in any edition, which was seemingly designed by an annoyed adversarial DM to be as hostile to players and as un-game-able as possible (most people just ignore that, thankfully, just play it as "BIG TRADE CITY", which is not what it is on paper, which is a weird, soul-less and deeply oppressive city).
Greyhawk is fine but not terribly remarkable. Such is the curse of coming in early I guess.
Sharn is pretty good though I think the "City of Towers" aspect isn't as convincing as it could be.
Ravnica has better cohesion
It arguably does, but that's also what ultimately part of what makes Ravnica unconvincing. Cities IRL and in history and even in good fiction don't have that kind of cohesion.
