My primary interest is pre-WW 2 custom single shot rifles. I have examples on many of the American actions: Winchester high wall and low wall, Stevens 44 and 44 1/2, Sharps both side hammer and Borchardt, Remingon rolling block and Hepburn (side lever and underlever), Farrow and Providence Martini. A handful of factory rifles by other makers, too.
I also collect custom bolt action rifles from the same era, and have a few custom lever actions, including a fabulous '73 done by SDH about 12 years ago.
My doubles (gun and rifle) are more eclectic - I probably have more by E M Reilly (London)than by any other maker/dealer, but have a nice group of Lefevers (both LAC and D M), a few each Parker, L C Smith, Fox, A. Heym, "Daly" by Lindner and others, Lindner's with other dealer labels, Smith of London, Faukner (Prague), Foerester (Berlin). Drillings by Foerester, Kirkwood, Heym.
I have a few handguns, mostly single shots, and a large number of custom knives, primarily in the San Francisco style.
If it is nicely made, I like it, and I've been fortunate to be able to indulge my collecting instincts!
