Favorite? Hmmmm.... That is hard to say. It largely depends on where I'm going to be and how I'm dressed. Probably overall my Kel-Tec .32, just for sheer convenience and conceal-ability. You can carry it concealed at the beach. The Kel-Tec is not pretty, nor is it any fun to shoot. It is functional though.
I have a Beretta Cheetah .380, a Beretta 9mm 92FS, and a Kimber Crimson Carry .45ACP for other occasions and I am always looking for other suitable fashion accessories.
Now if you want to talk holsters, that's a whole new topic...