I have some balance in it, I guess...
I usually play dark side male Revan, but save Juhani at the grove; I somehow can't kill her, I tried it last week and it made me feel uncomfortable, so I save Juhani, then go terrorizing the galaxy and after all the effort I've put in training my (usual) padawan Juhani, I slay her on top of the Rakatan Temple.
I do play Lightside too sometimes, usually as female Revan. then I take care of trying to turn Bastila back to light, but I'm not always succesful, so I just kill her then.
btw: Pale skinned brunettes? *drools*