I suppose that like most of us, I'm a product of my gaming upbringing. I started with OD&D and through the years moved from this system to that one. Along the way I'd come back to the current iteration of D&D, I may not have been a pro but I was certainly current. Decades later that hasn't really changed.
With my introduction to the OSR I've begun to embrace a lot of things I left behind. But there is one thing that I am not sure I miss. The multi-level dungeon.
I know there are fans of the multi-level/mega-dungeon out there. I admit it is strictly a matter of taste -- but for me a big part of RPGs is interacting with NPCs. And you may find a friendly Ogre or a peaceful tribe of rat people on your voyages, but if most of your sessions are spent probing floors, lighting torches, and so forth? I just find that I get weary of running them, and weary of playing them. For me it's the interaction that lies at the heart of a successful and entertaining game.
Now certainly there is no necessity to run massive-dungeons. But as I re-explore gold-for-exp, there certainly has to be concentrations of wealth out there, available for exploitation. It will remain an issue for me to tackle.