An E-diver and I discussed Ayn Rand's pseudo-philosophy Objectivism once....then we decided to move past the sub-par novelist's ideas and discuss real philosophical issues.
My fellow M-divers usually talk about either Megan Fox or sports.
The RC-divers I know talk about World of Warcraft and how to overcome their fear of girls.
The Chiefs interrupt our BS session and "ask" us if all our secondary maintenance is complete.
The JO's, after they participate in a 6 hour shoot-the-sh*t about all the women we've hooked up with, look down on us "dirty blues" with disdain.
We all shut up and pretend to either be studying or giving checkouts to the nubs when the ENG/XO/CO comes back to the ER.