There will be some aspects that draw from it, but it will be mostly serious. I'll probably make jabs at the Tau player about the Grotesques the Dark Eldar brought to fight for them as well as make jabs the the regular Eldar about how he/she needs to live a little and experience the "dark side". But any combat will be all serious,I play survivalists, and when something or someone threatens my survival I'll work together with my team to get the job done. If anything the more comedic side would come out during the interaction with my characters distant cousin. Because Dark Eldar are still Eldar in the end even with their differences and why bother living if you can't poke fun at family now and then. TTS was actually quite informative about the 40K universe when I first started learning about it, despite being an AU at the same time.