I like both for different reasons. With group RP's, as long as it's relatively free-form, it's a great way to experiment with different things - I tend to be more open to things in a group because it's just for fun. For really in-depth, detailed, intimate RP's, though, I'd rather have it be private.
I've never tried a mass inflation but I don't think I'd like it. More often than not everyone has such specific tastes when it comes to inflation that I think it would be hard to please everyone involved. Maybe I just don't have a good understanding of how it works, though.
Stories I have written