My preference is a revolver with a hammer. Hinton's model 49 is a great example of a shrouded hammer.
I carry a Colt Detective Special. Six holes instead of five and a nice wieght.
In my never-so-humble opinion, a steel frame snubby is light enough to carry easily and heavy enough to shoot well.
In other words, I recommend you avoid the ultra light guns. At some point a gun gets too light. For me, that number is about 20 oz.