Haha!
I think Lucky & I posted about the same time.
We each said pretty much the same thing...
The routine point is a good one too.
One thing I can add - get a copy of "Rottweilers For Dummies." It's really an excellent book. If the other large dogs you've had were not working breeds, a Rottweiler (or GSD, Ridgeback, Bouv, etc etc) might be a bit different in attitude than what you're used to. Many of these dogs really thrive with structure and training, and can get a bit pushy or or develop bad habits if not secure in their place. Such dogs truly love their leaders.