I am running an Dark Heresy game with the newer (and rather more polished) OW rules. As the themes will include the horrors that exist in 40k and their affect on the PCs, I'll be using a fair amount of awful situations involving fear and corruption.
I was wondering about how Fearless affects insanity point gain. The talent specifies that you are immune from the effects of fear, but not that you are immune to insanity. However, Insanity Points are only gained in the rules as coming as a result of failing fear checks. I'm not sure if this is intended, as getting a talent to become completely immune to a major character-affecting thing, like insanity, seems at best overpowered.
Has anyone else encountered/considered this? Just because you show no fear doesn't mean you aren't haunted by what you have seen. Even Space Marines (in Deathwatch) can gain insanity, though admittedly only though extreme circumstances. But they have rather more conditioning and experience than a DH or DH character.
Also, I noticed that there appear to be no insanity points given for failing fear in combat in the OW shock table, but I plan to just add gains based on Dark Heresy's older table to that.