Holy fuck am I stoked about this game.
MH2 is pretty much the antithesis of OSR style games. (Meanwhile, I have a freshly arrived copy of Runequest Classic Edition sitting on my coffee table... but that's a post for another time.)
MH2 is very, very different from any game I've run before, including Monster of the Week. This game changes some of my basic assumptions about the role of the GM, the concept of setting/lore, and the role of players. A little shared narrative control has turned out to be pretty awesome, as my players have some pretty dope ideas that I'd never have thought of.
An interesting flip from my usual GMing style is how I have to take notes on my game. NPCs are created on the fly, but with backstories tying them to the characters. The players sort of create the lore as they go. Instead of me starting with a bunch of stuff prepared and let the players loose on it, I have a blank piece of paper that gets filled in as the players have their characters do things, decide things, take interest in things.
A second flip is that there is no secret information in MH2. The players voice internal things about their characters. The players know secrets and misdeeds that the other characters do. There are no notes, there is no taking a player in another room to discuss secret info. This has not resulted in metagaming, but rather some cool narrative steering. There are still plenty of surprises. It sounds paradoxical, but it really works.
What we come up with together is far, far cooler than anything I'd have come up with entirely on my own.
The urge to prep is strong, but MH actually kind of proscribes preparation. I'm quickly embracing this principle.
A disclaimer: I would probably never run B/X D&D this way, nor Stars Without Number, nor Runequest, etc. This style is built into Monsterhearts 2.
We decided on a shared setting between MH2 and Monster of the Week. The two games are both "Powered by the Apocalypse," but they have different stats and different specialized mechanics. For now, the shared setting is entirely narrative. If mechanics come up, I'll sort something out. (I've already kicked around a few ideas in case a character should switch setting, but it's more art than science.)
The plan right now is to run a season of MH2 before going back to do the second season of MotW. My long game plan is to switch back and forth, at least until the MH characters graduate. (Or, you know, die or something.)
I'm tempted to start a campaign wiki of some kind, perhaps on Obsidian Portal. I've used OP in the past, but I usually end up falling off the wagon in terms of keeping it updated. I suppose I could enlist the players to help me out. Right now, I'm keeping notes for each session, and I find the idea of merging them and keeping any sort of organization to be a bit of a hassle. MH has a lot of side characters, a big ol' web of personal relationships/baggage, and lots of places generated on the fly.
Our next session is tomorrow. Must...fight...urge...to...prep...