The first center fire rifle I owned was a .35 Remington.
I shot my first deer with a 6 mm Remington.
I killed my three bears, biggest bull elk and biggest whitetail with an 8 mm Rem mag that I still own. I don't own the original of the other two but later replaced them after I stupidly sold them.
I bought my first .41 Rem mag handgun when I was 16 and still have it.
Those four are my favorites.