To me, too, Peter is way too firmly established in my mind for movie-Peter to take over. Movie Peter was totally not what I was expecting at all. Whereas Sirius totally has no characterization in my head that I can clearly visualize. Remus is somewhat there, and definitely does not have a mustache.

I love Fudge's pinstripes--totally awesome. And was it just me, or did Dumbledore wear the same outfit during the ENTIRE movie?