Indeed, in some clinical environments it has been noticed that clients afflicted by major depression have great difficulties in recalling good memories.
I am not a psychologist or even anything remotely close to that, but I can attest to the above being so right as I have witnessed a lot of people with similar behavioural tendencies.
This is an interesting event indeed @greenrun, I believe that the emotional state does not even have to go as severe as depression, even in a sad mental state this seems to be the case. I do look foward to seeing research that explores this further.
Thank you for the input!