I was like you, once: naïve, directionless, wholly corporeal. Then, one fateful autumn evening, I dreamt of a towering white fortress.
The concept wasn't alien to me, "drop-in" and "rotating cast" being something that I've informally done in the past. Once I actually decided to do an intentional open table sandbox, however, and embrace it as a style rather than as a consequence of accursed schedules, my previous preconceptions of running a big game had been irreversibly shattered.
After getting some new, heavy-duty conceptions, I proceeded to have a pretty excellent time, lasting for well over a year of regular games, and the experience was as enlightening as it was entertaining. The game's tragic demise was caused by a combination of personal small-scale complications and impersonal global complications, but it was a rollercoaster ride throughout.
With recent developments, I may have the chance to bring the game back to life (at a reduced, responsible, internet-reliant capacity). And since such a ritual requires the removal of significant refuse, both from my sanctorum and from my own mind, I thought I'd take the opportunity to share some of the lessons I've learned.