Small curiosity .  I feel like The Lord of the Rings and Game of Thrones are squarely set in the Middle Ages, while Rothfuss Kingkiller Chronicles and Sapkowski’s The Witcher (or at least the Video Game versions) are set closer to the Renaissance (early, of course).  I myself have a greater preference for that point where the Middle Ages are ending and and the Renaissance is just finding it’s feet.  Obviously anachronisms will occur in science and society (without even bringing up Magic) but I feel this time period is the most comfortable for me.

What about you?  Obviously consider not just general Age but also location if that matters.

Edit: I’d have done this as a poll but I wasn’t sure If (for example) I’d want to include the various eras of Japan or other civilizations.

a wildly anachronistic mix of 8th to 16th centuries europe.

The year 1000.

Mostly late-mediaeval/ early renaissance, with much anachronism. One of campaigns my son DMs for us has an 18th century age of sail setting. 

eclectic.

Foundational premise is based on post apocalyptic science fantasy, and technically takes place on a world that was colonized and then collapsed and deals with periodic widespread destruction.

Technologically, a blend of stuff in terms of warfare, but mostly standard sword and sorcery late middle ages (1500's), socioculturally it sits around a semi-feudal structure locked in a decadence and cold war inspired structure.

Think in terms of a fantasy world from any isekai.

Usually early renaissance tech but dark ages time period and it’s usually a mix of Scotland England France and occasionally mesoamerica

Probably antiquity but with more magiteck.  

Pre gunpowder, feudal, mostly developed continents, high politics more than poor species relations

Good question. I guess I never gave it much thought. The age of sail, certainly - with large ships that propably would have had cannon in the real world. I toy with elements of steam punk (that's the dwarves' thing, really), and there is such a thing as hot air balloons. But no gunpowder. 

One homebrew world has only three cities, the rest of the world still being the domain of wild and unchained nature - plus there are at least two cities I'm not telling the players about, but they are outside the ecosystem anyways (underdark and necropolis).

Another is far more like europe in the 1200's maybe, but climate-wise closer to the mediterranean - Greece/Morocco/Egypt and so on. That world is really strange, but it's unclear whether the PC's will ever find out. 

It depends on the group and adventure I'm running.

For example, if I'm running a high, or medium magic setting then technology just dead ends. After all, why would a civilisation with ready access to magics develop technological solutions to the problems over magical ones. So, in such settings we'd be looking at Anglo-Saxon or Viking levels of technology. Perhaps the most advanced in that setting would be of a greek, eygptian or roman level. 

If I'm running a low magic setting where only the very priviledged few have access to it, or perhaps entire races do not have access, then technology would be more akin to that of the Early Modern Era (Spanish Armada, Corsairs, Shakespeare etc). Firearms are just being developed and trade routes are both well established, protected and reliable. So, we're talking the height of the Silk Road and the trade that developed along it. 

I personally adore Renaissance-style worlds, but I’ve personally spent a lot of time working with post-apocalyptic and steampunky stuff lately. I have created a nice blend of the steampunk stuff being mixed in with dark fantasy based around feudal Japan and the Renaissance mixed in with a wee bit of Danish mythology.

I don't know, it depends.

I mix aspects of the Victorian, Renaissance, Medieval, and Elizabethan eras quite often. Usually different towns and different parts of the world have different styles to them. 

I also have certain areas that are based on Iron Age Celtic culture and others based on old Russia.