Tips on starting a new AP

[forger42]

I'm currently running through Rise of the Runelords as a player (we just cleared the Graul farmhouse). But when were done with that, I'm thinking of taking over as DM with a new AP. But I'm not sure what AP I would like to choose. I used to run a Planescape campaign back in the 2nd ed AD&D era, so if there's something similar to that, that might be fun. But I like the more classic ones like RotR is as well. Also I like it when there's some intrigue, and devious characters who trick the players into doing their work for them :)
If I decide on an AP, I'd like to start preparing before we're done with RotR, but I want to avoid any potential spoilers. Anyone have any suggestions?

[Brother Fen]

I've never run it, but I've heard that the Second Darkness AP features some planar/planetary travel.

Module-wise, Beyond the Vault of the Souls does the same.

[Chris Mortika]

Based on your description, consider Carrion Crown.

Trust me on this.

[Gambit]

Reign of Winter might be one to check out. It has the PCs working somewhat with a notoriously "evil" figure and a bit of (rather interesting) plane hopping.

If you also love Ravenloft then Carrion Crown is another to look at.

[Brother Fen]

Beyond the Vault of the Souls was written by Colin McComb who wrote Planescape. Some of the early reviews buried the module unfairly in my mind as the reviewers were upset about the lack of statblocks for many of the encounters. Coming at it several years later and a full stack of Bestiaries and Tome of Horrors on my shelf, I have stats for everything and the adventure itself is packed to the gills for 32 pages. Well worth revisiting.

[Tangent101]

Reign of Winter has some really nice faerie tale themes. And I'm not talking the happy ones. I'm talking ones where the hero doesn't prevail, the child gets eaten by the wolf, and the like. You know, the CLASSIC ones meant to scare people. You can play up that horrific aspect easily enough.

[forger42]

Thanks for all the tips, but I actually wound up with Curse of the Crimson Throne. Seemed like a lot of people have rated it very highly, and I like what I've read of it so far.
I was thinking, is there a thread or something with discussion about common unexpected player decisions or something like that? It would be nice to be able to be somewhat prepared for players choosing to do something outside the scope of the AP, as I'm not the best at improvising :)

[Brother Fen]

There's a whole forum dedicated to the individual paths. Just scroll down through the main forums. Plenty of GM advice and references posted there.