Current practice here involves two cameras.
One is our Canon PowerShot G16, a very capable fixed-lens machine. It has a fairly small sensor (so-called "1/1.7 inch", which I call "1.75/3"). Its native image output is 12 Mpx in size. The lens has a field of view range of 28-140 mm ff35 equivalent.
The machine can be readily fit in the pocket of even my dress slacks, and very easily (along with my wallet and coin purse) in a front pocket of my usual pants, "dock pants".
The machine does excellent work, although of course its small sensor means that operation requiring high ISO sensitivities face compromises from noise.
The machine has a usable, but not wonderful, optical viewfinder, plus a very capable non-articulated rear display panel.
A nice feature is an automatic eyelid system that covers the lens when the camera is off. But the eyelids are delicate, and themselves are subject to injury (in fact the machine is in hospital just now because of damage to the eyelids).
************
The second camera is a Panasonic Lumix DMC-FZ1000. This again is a fixed lens camera. It has what I call a 3/3 size sensor (often called "one inch"), with a native image size of 20 Mpx. The lens has a field of view range of 25-400 mm ff35e.
The machine has a very nice electronic view finder and a nice fully-articulated back panel display. It has a wonderful human interface, with extensive capabilities for customization.
It is quite large, about the size of a current Canon "Rebel" series dSLR body (although rather lighter than that). It could not fit in the pocket of any garment I could imagine (except for example one intended to cover a light aircraft). But the lens retracts when the camera is off (or "sleeping"), so the overall "envelope" restante is not nearly as big as if we had a "Rebel" dSLR with a lens aboard of even close to this field of view range.
It is a very enjoyable camera to use, and produces very good work in my situation.
************
I continue to be tempted by the prospect of getting a small "system" (interchangeable lens) camera, with a larger sensor so as to give better performance when lighting conditions dictate the use of a high ISO sensitivity.
I am very tempted by the Sony e6000 body, with a sensor size of 5/3 ("APS-Cn"). It is available at a very modest price (typically, in the US, USD 400.00), and is well spoken of in terms of image quality potential. It is a quite small body, and has what sounds like a fairly good EVF (not as good as the one on the successor e6300, which however costs about USD 600.00 more at present).
It is also available for about USD 150.00 more with the very handy Sony E 16-50 mm (24-75 mm ff35e) "power zoom" lens (which is reported to be of modest optical performance). With that lens aboard (and at minimum focal length setting), the camera is just about "pocketable". But that field of view range would not cater to all the work in which I am interested.
************
In any case, my current plan (subject to change, day-to-day), is to "stick with what I have."
Best regards,
Doug