Ky Larry,
Speaking only for myself, it's not that I don't enjoy shooting both (I do) but that I collect guns and have just lost my enthusiasm for collecting Flat Black People Poppers. An old Mauser or Mannlicher-Schoenauer or Springfield is an honest-to-Wodan Piece Of History. It has a story, it may have been used in combat, it has decades of history soaked into its wood furniture along with the cosmoline. While I like my EBR's just fine, the fact remains that my Daewoo or Beretta are just commercial replicas of military service rifles. They shoot just fine, and I guess I like 'em okay, but they don't really fit in the mileu of my personal collection anymore. That Daewoo could be turned into three or four or five good Mausers or Enfields. The Beretta is worth enough that I could go hunting for Siamese or Persian Mausers, Ljungmanns or FN-49's, or pretty much any other milsurp I wanted if I cashed it in.
I've pretty much decided that I like and use my HK enough to keep it, my AK stays because every collection needs one, and I need to pick up an AR, but the funkier guns deserve to go to someone who collects and appreciates them, rather than sitting here gathering cobwebs.