I loved how Sisko enjoyed finding out he intimidates Worf. What I'm curious about is how Sisko is able to intimidate Worf when Picard couldn't. Worf got in Picard's face in First Contact, but he does seem more... reserved around Sisko.
Picard was a diplomat. Sisko was a general.
May have been some Klingon stereotyping going on there too.