Nope. Not badass enough.
There have been a lot of great fights, but I really did enjoy the fight between Kenpachi and Tousen. Crazy people = teh win. The inner dialog he had with members of his squad was hilarious, too.
In terms of action, Byakuya vs Ichigo. It lasted quite some time, and had plenty of really cool moments. Ichigo showing off his shikai ability, showing up Byakuya numerous times, zipping around him, blocking, the hollow, etc...
No fights with Aizen. He pisses me off too much.
