StreamOfTheSky
Adventurer
I voted for 6, but it heavily varies. For a "good" session, the prep work can easily go 8+ hours, especially if I'm statting out NPCs. I can handle the basics pretty fast (I'm actually scared at how I can look at the class and on the spot think up ballpark ability score figures that seem good and have it match the game's point buy), but I'm a total powergamer as a player, and I can't help but twink the 


out of my NPCs in a similar manner.
That said, I also do a lot of "no prep" or as I call them, bs sessions. Those I spend 0-1 hour on, pull out interesting-looking monsters from the manual with no major moderations, and secretly map out the dungeon layout as I tell the PCs which ways they can go. Shockingly, no matter which routes they pick, they'll encounter the same exact things, and the on-the-spot mapping is mostly just to make sure i don't write myself into a circle and let them catch on that I'm making it up as I go along.




That said, I also do a lot of "no prep" or as I call them, bs sessions. Those I spend 0-1 hour on, pull out interesting-looking monsters from the manual with no major moderations, and secretly map out the dungeon layout as I tell the PCs which ways they can go. Shockingly, no matter which routes they pick, they'll encounter the same exact things, and the on-the-spot mapping is mostly just to make sure i don't write myself into a circle and let them catch on that I'm making it up as I go along.
