I do not have a favourite. There is a place for it in other aspects of life but I don't like competition in the creative arts, it only discourages "losers" and puffs up the "winners". Anyway, the nature of personal improvisation being what it is, in a certain strict sense, everybody should be his or her own favourite. If an improviser can manifest the deepest aspects of his psyche, his soul if you like, through the instrument over many years, as an ongoing personal development over a lifetime, then that person has no need of either praise or blame.I hasten to add that my rejection of competition is purely personal. Others, of course, are at liberty to use it as they please.