I find myself saying 'well DH, it is unreasonable because...'
amongst other things.
he used to do the Charles Saatchi school of apology 'I am sorry that you are upset by that' rather than 'I am sorry that I have behaved in a terrible way and have upset you.'
I used to get so frustrated but feel that reading through rationalised debate all day every day curse you MN app has helped me to express WHY I am frustrated and tell him so.
he is now much improved 
also, my inner rage beast has made less of an appearance. In the past during conflict I would be raging 'ARGH WHAT A MASSIVE KNOBHEAD!!!!!' when referring to bil
DH always said stuff like 'well you don't like him anyway so you are wrong'
whereas NOW I Can say 'bil is a massive knobhead because x,y and z' (as I did today after he badmouthed me)
and DH said 'I agree, you have a point!' and proceeded to join team NotYo 
MN May have saved my relationship by being entirely too reasonable