What is your favorite pistol you own?

I think it depends on the gun for me. I like .45 in my 1911s. I like .40 a lot in my USP. I like 9mm in my Glock. It's hard to choose a favorite.

That's a tough question, like asking "which is your favorite child." I would say the top four (one per kid) are:

1. Colt Series 80 Officer's ACP in 45ACP;
2. Walther (Interarms) PPK in .380;
3. Ruger Security Six in .357;
4. Dreyse 1907 in 32ACP

Like my kids, each one is VERY different from the others and each serves its own purpose in my eyes.