My favorite camera's are Olympus PEN series camera's. I love the look and feeling of these small camera's. With the right lens they will fit in your pocket and form the perfect day to day walk by set. I often carry two of them in my pockets. By now I own a PEN-P1 (had to get it when it first came out), a PEN-P7 and recently a wonderful PEN-F. The last one is the perfect companion for the old G.Zuiko Auto-S 40mm f1.4 manual lens. Other favorite prime lenses are the Lumix G 20mm f/1.7 and Olympus M.Zuiko 75mm f/1.8.

I also own two full frame Canon camera's (5D and 6D) which are great but heavy.