Personally, I've found one of the more stimulating ways of playing in recent times has been to kind of move outside the free improvised area and work with people who are probably improvisers but they have a particular way of working.
“Friendship is a pretty full-time occupation if you really are friendly with somebody. You can't have too many friends because then you're just not really friends.”
“Money is the sovereign queen of all delights - for her, the lawyer pleads, the soldier fights.”