None really, if I'm home when it's on, I'll watch it.
Sometimes Raw, sometimes SD, I seldem get to see ECW, but now it's on Thursdays too it's improving for me.
My favourite is SD simply because it has Benoit and Edge on the same show. There's no reason for me to watch Raw atm as it's crap. And ECW has CM Punk, so that gets a tick too.