Looking for the positive in life is great, and I try to do that as well, when my depression allows me to. But the way I see it (and I understand that my POV is coloured by my own biases here), talking to the negative behaviours as if they were living entities is a bit infantilising, it's as if the T tries to trick the client with some kind of mind game, and I don't like that sort of thing, I react very badly to it. Besides, my self-sabotage is definitely not about doing the best I can for myself, there is no positive intent. Instead, it's an expression of my self hatred, and my T would never say that my self-loathing is a positive thing. He tries to undermine it with logic all the time, which is pretty much the only thing that works for me.