In my previous writing, nothing has ever come as a surprise to me before. In my long-ish Snape-centric fic, my big bad WiP, I am discovering all sorts of things. For instance, Snape/Regulus just popped in. I had no idea that was going on. Also, Snape keeps insisting he doesn't think much of that Evans girl, despite all my attempts to portray the opposite. We're still fighting over that one.
It is an odd experience.
I think I need a taskmaster/beta of my own. Luckily, I recently found hp_betas for just that purpose.