I have the E-P5 nearly always with me in my jacket pocket – the compact size of the camera and the lenses make it possible. It doesn’t fit in the bags of your trousers though ;).
Besides the retro-style the cameras also has it’s technical qualities of course: The autofocus is fast and precise, lots of buttons make customizing very easy and the 5-axis-stabilizer makes great low-light pictures possible. In addition the camera is quite inconspicuous so Street Photography is one of the main areas I use the camera for.
I’m not a fan of test charts and pixel comparisons between cameras, the usual webpages which deal with camera reviews are much better with that. For me the camera must feel good in my hands, it must be fun to use and if the quality of the pictures is good I am happy. A nice looking camera body in addition is welcome of course ;). Here are some examples taken with the Olympus PEN E-P5 and the M.Zuiko 17mm F1.8 / M.Zuiko 45mm F1.8 lenses.
So this is the camera I have (nearly) always with me, you can see my complete photography gear on this weppage, too. What kind of camera do you always have with you?