Look for smart, thoughtful design in the camera itself: A webcam clip and mounting design that's versatile and adjustable when perched atop or clipped to a laptop or notebook screen, that can sit on your desktop or monitor, or those that have a standard camera mount hole for attaching to a tripod.
For MOST people a simple, hassle-free, futz-free fixed lens cam may be your best straight-forward choice.
Above are simple choices in a UVC compliant web camera: All of these are quality UVC compatible HD Web cameras from Logitech ideal for any budget.
Choose from the razor-sharp premium Zeiss lens autofocus C920 (1080p) with stereo microphones, the autofocus C615 (1080p) with convenient camera tripod mounting hole, or the value-priced fixed-focus C310 (720p) HD UVC compatible webcam with great light management and clarity.
Look for good low-light sensitivity to give great image quality for both day AND night lighting conditions.
Cams that refer to Auto Exposure and Auto White-Balance indicate a webcam that can adapt to changes in lighting.
Autofocus cams can be a double-edged sword: The can adapt to normal range or show close-ups without manual adjustment.