As a rule, I think you can look to the factions Unlimited character and get a feel for what they are all about.
In the case of FD, it is rushing with cheap, but power to cost effective characters. Warpath is all about midgame fatties, undercosted for what other factions would pay. Genesis is about combinations and cards feeding off each other. Verore is about death and zombots are about the graveyard. DoD is about a strong defense.
Very limited look at the factions, but essentially true.