The idea of people teaming up for a goal to be tricky since I've run into characters created who aren't meant for a group situation and those are a pain to deal with. Either intentions aren't pure, trust is hard to gain, they're a loner, whatever issue they have is hard to factor into a group. Sure, in real life not everyone is a team player but sometimes there is a bad apple or two that the whole group may need to gather around to rally them to give a fuck. For me, this issue comes up often and is a drain on interest and motivation to push past the beginning stages of meeting and giving characters trust to grow. So the fantasy quest/Inn/whatever RPs tend to be more miss than hit from what I've encountered.