- Homebrew
- Forgotten Realms
- Rokugan
- Planescape
- Al-Qadim
These are my options, tho I am sure I won't have time to actually play more than 2-3 at best.
Probably my first and easiest choice for home gaming will be our old homebrew setting called Arborea (itself a mix-n-match of Faerun, other published settings/adventures, and original stuff), if only because the DM has put some material online and I can still remember it well. For the player, it'll be just an unknown world with some elements and locations "stolen" from existing settings.
Forgotten Realms would be even easier to DM once we have a 5e campaign setting book for it with 5e character material and monsters (so that I don't have to make them up myself). However I don't like what they did with the settings after 3e, and probably even some stuff was better before 3e. As far as narrative material, I might be better off just using my 3e FR books, but then obviously I'll have to miss out on the crunch, or convert it myself. The main risk of playing a FR game is always that of having a player that knows more than you and will catch all my mistakes, so I'd rather play this with casual gamers only.
I am making a 5e conversion of Rokugan, which is my favourite setting. I certainly want to play this, but because of its strong oriental flavor, it tends to have a smaller audience compared to classic D&D, so I have to check if my friends are interested. Furthermore, designing adventures is generally more difficult for me, since I'm not very good at writing intrigue stories.
Also love Planescape and Al-Qadim, but I don't have the old original sourcebooks, so I'll seriously consider these only if they publish 5e books of them.