I know that I'm a fine one to talk, I must have twenty adapted lenses clogging up my cabinet right now but I am finding that as of late that I am definitely finding that I have a few lenses that I am using regularly and very pleased with. As well as quite a number that seem to be getting less and less time on camera. What is most interesting to me is what lenses they are (or perhaps what lenses they are not). My favorite lens right now is the Rokkor MD 35-70/3.5 macro. It really does live up to it's billing. It's not the sharpest or fastest lens that I have but with the added closeup ability it is definitely my most versatile. It is also very close to the sharpness of my primes between 35-50. I have also been shocked at how useful it has been in the dark rainy weather we have been having as of late and how well it has performed handheld at some ridiculously low shutter speeds. My second favorite is a toss up between my Rokkor MC 50/1.4 and Rokkor MC 50/1.7. They're both nice and I really couldn't say that I see that big a difference between them. I think the 50/1.4 might be a bit nice but just barely. If I had to pick I'd say the 50/1.4 if for no other reason that it is new old stock and in better shape. The final favorite lens is my Komine made Vivitar 28/2 close focus although it may lose it's crown to a Rokkor MC 24/2.8 I have coming. Honorable mention goes to my Pen-F 40/1.4. I like the fact that I can close focus to about a foot and close focus ability is really something that I like in my lenses. I don't think the Pen 40 could knock off either of my Rokkor 50's IQ wise but it's close enough to keep around. I will say however I don't LOVE it. It has never let me down image wise but there is something about it I find less than satisfying. The biggest surprise to me was the fact that I didn't even consider my Jupiter-8, SMC Super Takumar 105/2.8, SMC Macro Takumar 50/4, Hexanon 50/1.4, 135/3.2 or 24/2.8. They're all fine lenses (a few of them exceptional) but I don't reach for them when I head out the door. What are yours?