Personally what I really dislike more than "one thousand classes" is the multiclass system where you can make your "piece meal" build taking one level here and one level there, etc. As if making a character was some weird buffet. It's something I don't really like in principle even in D&D and Pathfinder just makes it worse.
I think my favorite multiclass system may be the one used in Pillars of Eternity 2 (and I don't even love that game as much as some other people here): you decide two classes upfront (with relative subclasses, if you really want to) and from that point on you are set.
This is why I like 5e better than pathfinder. Much cleaner. I don't hate the bloat in Pathfinder, but I don't think it makes the system "better" in any sense.
PoE 2 multiclassing is very well built. So well done that it took me a year or two to realize that single class characters are still strong (via higher power level scaling).
