Things that don't interest me? Well, I've played the field over the years, so I've owned about everything I suppose, but I guess I have sort of narrowed my tastes down a bit.
Single Action revolvers. I love the way they look, I love the way they feel. I hate shooting them. No idea why.
22's. I've owned dozens of 22's over the years. When I lived out in the country and could just plink with them, or use them for squirrel hunting, I loved them...both short and long. Now that I've moved to town, and don't shoot anywhere but an indoor range, and don't hunt anymore, I find them as boring as watching paint dry. Shooting them at a paper target just doesn't interest me.
Most semi-auto pistols. I've got one (A Ruger Security 9) that's one of my carry guns, but it literally is a tool. It's reliable, as accurate as I can shoot anything, and was inexpensive.
AR's, AK's and such. No interest at all. I've got one, but have never fired it, and probably never will. Actually, that's pretty much the way I feel about any centerfire rifle. I grew up in "shotgun only" country and just never really developed any interest rifles, other than 22's for squirrel hunting.
J-frame Smith and Wesson revolvers.
Ruger Revolvers. They're good guns, they just don't interest me.
Black Powder anything. I've tried them. Just too much like work for me.
Suppressors. No interest.
D/A revolvers with barrels longer or shorter than 4". I've got a couple of exceptions to that rule, but generally speaking it holds up.