If own, or are thinking about buying Neverwinter Nights 1, I would
strongly suggest trying Higher Ground Persistent world. bb.hgweb.org
The quality and sheer scope of the campaign is breathtaking. (And
really is a mini MMO)
Most importantly it is still well populated 24/7
And it’s free if you own the game or $10 if you buy it from gog.com
I just love hg and if you try it you will too.