Interesting thoughts... I do more puttering, renovating, upgrading and customizing on my handguns so consequently I spend a lot more time with them and can easily see and feel the changes I make on them... Naturally I feel more of a personal link with them... They are partly the result of my handiwork. I also shoot them WAY more than my long guns.
I can see how this would also be true if I did more of the same with my long guns but it just hasn't evolved that way... as much... Yet.
IF THE SHOE FITS, WEAR IT!... IF THE GUN FITS, SHOOT IT!