get these mother ****in' sith off my ****in' cruiser.
Pretty much says it all.

Who cares about meditation, mediation and diplomacy? It's Samuel L. Jackson, I want to see him cut things up with an awesome purple laser sword that can cut anything and reflect other lasers.

He does this, and it's awesome. It would be even better if Jar-Jar was the one being cut up, but battle droids do just fine.
I don't find much to comment on Jackson's role in the prequels. While I like him as an actor, there's literally nothing I liked about those movies, including the role of Mace Windu which looks to me very much like it was written for the sake of having Samuel L. Jackson in the movie.
Which is a perfectly valid reason to write a role in this kind of movie. Otherwise, there would be no reason to see the prequels. If they managed to write in Chuck Norris, Arnie, Stallone, Lucy Lawless and gave Christopher Lee more screen time, those movies could be a lot better.

Windu's badassery is one of the few redeeming qualities they posses.