Mercule
Adventurer
I was thoroughly burned out on 3.5 and d20 by the time Pathfinder was released, so I know very little of Golarion. I've heard only positive, though, and what little I know does sound cool -- maybe not my cup, but cool.I have a hard time deciding if Eberron or Golarion is the best published D&D setting of all time. It's sadly not actually a crowded field despite the number of published settings. I'd tend to lean toward Eberron though even if it isn't completely my cup of tea. I have a great fondness for settings that are coherent both with respect to the rules and the normal process of play. Eberron is coherent in that way and original in a way that nothing else has touched besides homebrews. There are probably 20 people on EnWorld with better settings than Forgotten Realms, but I don't think anyone can objectively claim to be better than Eberron - just different.
I agree about Eberron. It's just well done. If you follow what Keith says about Eberron, it becomes even cooler as you find out some of the thoughts behind things -- and learn what WotC added that he may not fully agree with. I can totally understand where someone wouldn't find the setting to their liking, but it's extremely rich in a generally non-cheesy way that no other D&D setting is.
Probably the saddest thing about Eberron -- aside from the criminal lack of 5E support -- is that it's almost too evocative for D&D. I remember pretty early on reading either Savage Worlds or the ECS (whichever I discovered later) and thinking that the SW system would probably suit Eberron's themes better than D&D. Since then, I've added Fate and (probably) Genesys to that list.