Checking my Lightroom metadata for the lenses I've used, "K or M" has about 15,000 shots.
Further breaking these down, 3,000 were shot at 28mm (making those my Sears macro), 5,000 at 50mm (making those mostly the Sears 1.7), 4,000 at 135mm (which makes a mix of my Sears 135mm,or, most likely, my Sears 75-260 set at the halfway mark for SR reasons) with the remaining 3,000 or so shot at various other lengths which means they were probably shot on my 75-260 as well. I don't touch my 400mm and 500mm Quantaray Tube-of-Dooms enough really to count them. in the totals.
As far as autofoucus, I have about 7,000 shots with my Sigma 70-300, 6,200 on the DA 18-55 kit, and 3,500 on my FA 28-90.
This means my two most 'common' lenses are the Sigma and the old Sears zoom. If I had to choose one of those two as far as pixie dust goes, it'd be the Sears by a landslide.
So, which surprises me, the lens that 'works best for me' would be my
Auto Sears 75-260 f/4.5 close focus, as that's obviously my 'go to' lens when I don't need autofocus or a 'fast' lens.
That said, my best 'holy smokes' pixie dust lens? That would be the lowly 18-55mm kit. It has cranked out by far the best shots when I've needed them and holds half of the top 10 'most interesting' flickr shots I've uploaded.
Which now has inspired me to go in and pick my 'best shot from each lens', but I think that may warrant a seperate thread. :-D