The ones I seem to see requests for the most are politics and skeptics. I'm not sure the denizens of skeptics are big fans of getting other stack's trash all the time, so that one may be out. However, I get the impression Politics would actually like to take a lot of our misdirected political questions.
In fact, as I look over our flags, of the 16 outstanding, 6 of them (a whopping 38%) are requests to migrate various questions to the Politics stack.
I can't speak for the other mods, but migration requests are more challenging for me to handle than other mod actions, because the process generally involves hanging out in a chatroom, which is forbidden to me during work hours. So a migration path to that one stack that users could perform on their own initiative would help me a lot.
I think we have a Politics.SE mod or two who hang here, so hopefully they will pipe in.