It could just be nostalgia but I believe Battlefield 3 to be the perfect balance of great action without being too complex And I know I'm not alone since even ten years after its release it still has a thriving community.
where battlefield three really shines is in the balance between weapons classes and vehicles it seems like it doesn't matter if you're using the very first weapon you're given in the game or the last weapon to be unlocked you can still dominate a map with that weapon and it doesn't matter your playstyle since you can play slow and careful as Recon or get right in the fray as medic or support or dominate the vehicle side of things as a mechanic