I like the bits about Space Marine awards and honorificas. These guys fight for centuries and they probably rack up dozens of campaign badges, honorary titles, and purity seals for acts of heroism that no human could hope to emulate. My favorite has to be the Crux Argentum: a silver and gem-encrusted version of the Crux Terminatus.
Y'know, for when the Crux Terminatus is too pedestrian and passé
Eldar Ranger #1: The tracks indicate a squad of astartes in terminator armor, exarch.
Eldar Ranger #2: What's that strange line between the third set of tracks? He appears to be dragging something between his legs.
Eldar Ranger Exarch: Those would be his balls...