For CCW, I'd vote "Both" if there was an option in the poll.
It may be said that no gun is perfect for every situation. I'd surely agree!
I've got several guns that I use as CCW guns (listed from lightest/most concealable on up):
1. My little Kel-Tec .32 auto is super-thin and less than 10 oz. It beats "nuthin" any day of the week and I can literally toss it in a pocket and it won't be noticed. Great in shorts . . . and in the tiny bike bag on my road bike (bicycle) when on rides in the country.
2. When lightweight is a must, but I can get away with a little more size and weight, my 2nd gun is a REVOLVER . . . a first generation Colt Agent w/aluminum frame. This light little .38SPL. snubbie carries SIX rounds vs. the S&W J-frame capacity of five.
3. My favorite "most times" gun is also an automatic . . . a "Lightweight Officer's-sized" .45ACP by Kimber, the original version of the Ultra CDP. Three inch barrel with .45 attitude at a light weight (for a .45). It also has nightsights . . . and shucks everything I've tossed in it to shoot . . . INCLUDING snake shot!
4. A little bigger . . . is my wonderful S&W Model 65 w/3" barrell. It is wonderfully accurate in .357mag.
5. MY FAVORITE HANDGUN . . . Nope, not the easiest to conceal, but MAN WHAT A GUN! In the winter, when I can wear layers of clothes, I'll break out the S&W 25-2 .45ACP revolver w/a chopped barrell down to a scant 3 1/4." Lots of custom action work on this one and the slickest double action pull on the planet. If the S.H.T.F. one day, I'm hoping this revolver is in my hands! I've actually won a steel match against about 30 auto shooters with this gun in a match with EIGHTEEN steel targets and only ONE manditory reload! Yep, I had to reload twice IF I didn't miss!
These are my favorite five. Tonight, while taking our little dog on a walk, it was the Kimber Ultra CDP. Quite a little gun with a wonderful bark that is light and conceals really flat.
Over time you'll pick up extra handguns, if you love to shoot and hunt like a lot of us do! Of my handguns, here's a photo of my favorite five CCW guns, along with a couple I use in matches and hunting with Holosight red dot sights on them. Obviously, they aren't intended for CCW work!!!