Xenos gets one where a Space Marine Librarian reveals to Eisenhorn that the Deathwatch Brother-Captain wanted to ask about how Eisenhorn killed a Chaos Marine in single combat... but didn't dare. Remember that said Brother-Captain would have faced off against most if not all of the alien horrors out to get humanity.
In any event, one can't forget "He was the perfect embodiment of civilized strength in peace, even extending his little finger to drink the tea Bequin brought us. The fact that said finger was the size and shape of an Arbites truncheon was beside the point." or "'You ceased to be Pontius Glaw, seventh son of a respected royal family and became Pontius Glaw, notorious sadist and idolator.' 'Indeed, and now I am a very dangerous and erudite box."