I've got a few that I rank in different categories, my winchester 9422 and ruger 10/22 for affordability, my ak-47 for the over all fun factor, and my mauser 30-06 for sheer power.
My Rossi 62 is the cheapest firearm I own, and has been my "go to" for a long time now. The best break down 22 I've owned, and crazy accurate. It's nice to be able to shoot anything I poke in it, from bulk 22lr to CB shorts.
this is purely nostalgia but..... my favorite is the greatest military weapon ever made... the m1 garand.... i qualified with the m1 in army basic training at fort knox, ky in 1959.... at the old age of 17 years....
I don,t know whay it is, but I know it can be an addiction. I love 22s and I am always looking for my next one. My first rifle was a Marlin Model 60 that I got for christmas when I was 13. Stll have it, still take it out shooting quite a bit, still shoots like a dream.