There are cases of people which have had heart transplants who go on to take characteristics of the donor.
eg. people with no artistic ability starting to paint proficiently after having an heart donated from a recently deceased person artistically proficient.
Other such examples such as athletic ability being passed on from the donor.
From a scientific standpoint I do not see this as at all surprising: the heart is not just a pump but is also connected to the nervous system and brain.
This sort of thing puts me off from donating. I find it a bit freaky.