My eye is toward function, and I tend to be willing to consider anything that seemingly meets my functional requirements.
I suppose I'm partial to the 9mm cartridge in pistols of decent capacity. I suppose I do like lever-action rifles. Of the popular ones, I have only acquired Marlins. Being lefty, I am partial to designs that support easy manipulation of all the controls via a left hander. I have acquired a number of lefty-friendly pistols, and a couple of lefty rifles.
I've still got a Browning BDM, which should tell you something: no, I am not particularly partial to a make/model of gun simply due to that make/model.