I've got an F-mount Q version with seven aperture blades and a shockingly beautiful blue coating, like this one:
It is a stellar performer with a special look, which I think comes from having such a simple optical formula (only four elements) that also happens to be one of Nikon's oldest (it predates even the Nikon F). Unlike the 105/2.5, the 135/3.5 never reached legendary status due to its pedestrian maximum aperture.
I have to admit that I'm a wide angle junkie and I almost never use lenses longer than 50mm, but when I do, the 135mm f/3.5 is the lens I grab. Mine no longer accepts filters due to a drop, so one of these days I'm going to get another of the same vintage.