They're just great guns that feel fantastic in the hand and as someone else mentioned earlier, you can pick shooters up for reasonable prices.
I got an Argentine FM Hi-Power for under $300 at a local gunstore, that shoots dead on on with Wolf 9mm and never skips a beat. The Mil-Spec ones have crappy triggers, safeties and hammers, but they're great plinkers. Or for use as a base gun to customize.
I'll keep my Glock and Sig for serious work, but I don't like shooting them as much as my Hi-Power.
"Our contract called for 16 cases of rifles and ammunition for $10,000 dollars, not a machine gun...........That is our present to the General"-Pike Bishop