I have three .22 rifles and each is my Favorite for different reasons. The 15-22 is bags of fun to shoot and holding it reminds me of the M16A1 that I carried in Vietnam. I didn't get a "full-caliber" AR because I'm not planning on going to war again and I don't hunt anymore either. The cost of feeding a 5.56 is usually considerable also. But the 15-22 is a hoot and when I'm holding it it sure is my Favorite Rifle.
But I also have a Henry Golden Boy and that butter-smooth lever action is a joy to work! My creaky eyes still appreciate the vision of a polished brass bead between the ears of the buckhorn sight and the gleam of all that shiny metalwork and walnut is always a wonderful thing. That it shoots so well through that heavy, octagonal barrel also brings a smile to my face. The Henry is a beautiful thing to see and shoot and when I'm holding it it certainly is my Favorite Rifle!
Then there is this old, beat-up Springfield 87-A semi-auto there in the safe. It's stock is worn and scratched and needs a lot of attention and someone (my Sister!) took 400-grade steel wool to the metalwork years ago "to make it shiny" and removed what blue was left on it. The butt-plate and trigger guard broke a while back in a closet (stuff falls over) but Numrich made sure I have the parts to fix that after the stock gets done. It really doesn't sound like much but it was with this old Springfield back in 1952 that my Grandfather began to teach me about shooting and marksmanship. It was his farm-gun, saved for foxes and coyotes and the occasional snake. He showed me how to stalk a rabbit and where to put the sight on a groundhog for a quick kill. He let me use it to become a sniper of varmints on our little patch of Missouri and now I need to get it fixed up so my grandkids can also shoot and learn from it. When I look at that old rifle and remember the man who owned it and taught me with it, it certainly is my Favorite Rifle!
I guess I just can't answer the question...