I'll defiantly be starting off with Jade, my very first Shepard who I started both ME1 and ME2 with. After that...probably either my Male renegade or my loserShep. From then onwards it'll depend on what class I feel like playing as.
Im gonna do the same thing. I started my fight with my renegade fem-Shepard, I'm going to finish the fight with my renegade fem-Shepard. That said, I will create a new Shepard with the sole purpose of going through all three in one long continuous run.