What was the first system you played (or ran) that wasn't DnD?
(The purpose of this post is to give people a few ideas of games they could try if they are going to skip D&D 5e 2024. It isn't for D&D bashing - that's how nearly all of us started!)
For me it was GURPS. We wanted to run a Halloween game about shapeshifters infiltrating our friend group and DnD 3.5 didn't fit the bill. In hindsight, it was way over engineered and not the right system for the game. Should have gone with something simple and freefrom (next year I ran the same thing with RISUS).