I was very partial to the two 105mm f/2.8s that I had for a short while. I got them both for free and sold to raise money to invest in FD equipment. Very small, a nice FL, and good quality prints (I did only do 6x9s from those negs, however). As it turns out, I ended up with a Spotmatic body and a 50mm 1.4 and 35mm 3.5 (again for free). Now I wish I had kept one of the 105s.