My all-time favorite is Godspeed. I've never figured out why, and I don't think I ever will. But that's at least half the mystery of being in love with music - trying to figure out why knowing that every answer is both right and wrong.
Next is Dreams for sure. I love the steampunk opening followed by the aggressive guitar riffs. I also think it's the first time that you really dug into your lower vocal range. It was a pleasant surprise.
Tbh, my favs are step right up, yga, and grim goodbye, not in that exact order for sure. I love all your songs though, and i can play several o em on mah geetar:)