Just an idea for when you do a Dreadnought, you could write "Extremely F******g P****d Off" somewhere, as we all know that the Angry Marines would rather kiss a Pretty Marine than being encased in a Dreadnought.
Since I'm sure even if they have suffered a terrible wound etc that they'd still rather kick the living day lights out of their enemies with their bare hands/ or the with the weapon at hand, albeit them hating being encased in a Dreadnought, because they can't beat their enemies with their bare hands anymore, nor face to face.
The 'Extremely
Aulma'd off thing' could be for the Angry Marine that was forced into the Dreadnought against his wishes/anger.