Morrowind was surprisingly good. It's old and bare-bones at times, but it's really fun. I played it for the first time in 2022 and my only regret was not playing it sooner. In saying that, it's very challenging for newbies. Like, wow. But really worth it to get into. The writing has so much personality, the gameplay is well designed (mostly...okay, it's a mixed-bag of pros and cons) and the environments/character designs are so well done.
Too many times have I thought "Why didn't they do stuff like this in Skyrim?". A basic description of Morrowind would be: think of the easiness of Skyrim and the brutality of Dark Souls - Morrowind is somewhere between the two and a really fun experience. It may be old, but it's a gem.