My first Ruger was the initial LCP which opened the door to practical EDC. Using a zippered cell phone carrier provides immediate access with out imprinting. However, my second Ruger is the EC9s which fits in the same carrier and provides better "on target" recovery for the 2nd shot. While it is not really an EDC weapon, I love my Ruger PCC with a green laser.
My favorite Ruger model is no longer offered. The original Hawkeye handgun in .256 Win. I shot my first one at the tender age of 17, was very impressed, and swore I'd buy me one "someday."
Well it took 35 years to finally get my first one. And that was due to a good member here.
But I was so impressed with it, that I named my gun range after it. That was long before I actually found one I could afford. Now, I own more than one. And again, it was due to the kindness of the members here.
It's hard to pick one, I love my 3 screw Blackhawks and Single Sixes,But I use a pair of heavily modified Bisley Vaqueros for CAS that have never let me down and then there's my SR9c I carry for self defense,I guess as long as it says Ruger,It will be a favorite.