I don't think I have transference for either of mine, so I can't say for sure, but I would say that if it were getting in the way of successful therapy, switching is always preferable (kind of like I'm switching specialists because the first one has terrible staff in her practice and dealing with them always makes me feel worse). If it's not getting in the way, or if you're in therapy because of problems regulating emotions, then I can see the argument for staying.