Well... this for us was in 2 stages.
First for us was to stop playing D&D. Even though we played it since the 80s, it's not a rpg, its a wargame people talk over. So we gave up on it two decades ago. Its just combat, and nothing else, and we wanted more guides, rules, and abilities around social and intrigue stuff. So since D&D can't do that, we switched to....
Vampire the Masquerade (and WoD et al). These systems sustained us for nearly another 20 years. They had rich rules for social interaction, characters were people with flaws and goals, and it spoke to both your ambitions and your vices. Good stuff! We didn't know roleplaying could be this good. Plus, since its not just a combat wargame, we had tons more diverse people join our tables. Which made the games even better as now we had styles of play and intrigue from so many voices. But then we got tired of 'being the monster', so we turned to...
Powered by the Apocalypse and its hacks. It truly is the best of the best. Combat is more fun that any other game. Social rules are lightyears ahead of even WoD stuff. It has a wild mix of settings and concepts, so we don't find it going stale. And it encourages better roleplay but even more so - it greatly improves GM skills and makes it 10000 times easier to GM and be a great GM.
We tired many other things too, and 2d20 has its charm, and Cypher is not terrible and FitD is good crunch. And OSR has old AD&D feels (for better and worse). So the testing of new games does not end, but honestly, PBTA is just so far ahead of the ... game.
