Personally, I don't think so. I had three instructors for my PPL; each with their own merits (one ex-Army, one ex-RAF and one ex-Navy). I've had different instructors for a couple of ratings and another for CPL flight training.
I can see the merits for having just one instructor for the CPL but prior to that, I'd get as much from each person as you can and make as many contacts.
Cheers
Whirls
PS - I'm also a musician - does that have a bearing?