Schulz is a nasty piece of work, often to be seen laughing and smirking as others speak in the EP in his role as leader of the Socialists*; he's a German replacing a Pole; he's also a bully, an arch-federalist and a shoo-in.
In 2008 he was famously compared to the Commandant of a Nazi Concentration Camp by Berlusconi and in 2010 Godfrey Bloom, a UKIP MEP, was ejected from the Chamber for calling out "Ein Volk, ein Reich, ein Fuhrer" during a Schulz speech. Compared to Schulz, Buzek was a pussy-cat.
* Full title is the Group of the Progressive Alliance of Socialists & Democrats - the authoritarian bastards.
Here's what Nigel Farage had to say about him earlier today (and please, do click through to the other videos that pop up in the captions - you can never know too much about your enemy):
"Anti-British to his fingertips"
With thanks to Captain Ranty for the Farage video
UPDATE: I wouldn't normally reference Wikipedia but in this instance I am because it's interesting to see the lack of background information available on Schulz compared to other politicians.