FORT WORTH - Well, that was interesting. That is the first descriptor that pops to mind in the wake of the performance by jazz greats Herbie Hancock, Michael Brecker and Roy Hargrove at Bass Performance Hall on Thursday night. The concert, dubbed Directions in Music: Our Times, was certainly interesting. Impressive, too. Even intriguing -- at certain moments. But entertaining? Maybe you should ask some of the many patrons who started heading for the exits by the second number about that one. There was no questioning the quality of the musicianship on stage Thursday. What keyboard wizard Hancock was doing,...