Depends. I have yet to play a (MMO)RPG with procedural content that is more engaging than one with well-crafted static content. IMO it works for strategy games, but not so much for RPGs. Yes, the procedural world is larger and has more replayability, but once your brain becomes used to the algorithms used to generate it, it becomes as repetitive as anything else.

I'd be happy to find a game that proves me wrong (not that I can afford the time to let myself get sucked into an MMORPG anymore...)

Immense scale and/or procedurally generated content would sell me alone. At any rate, don't be shy -- plug your game -- I'll be sure to check it out!