Don't be bashful! If you want comments, give comments. You don't need to be an expert photographer to express your opinion about the work of others. You don't need to go into great depth. A simple remark about cropping, composition, color, subject matter, etc. can be of just as much help to a budding photographer as an in-depth critique.
Taking pictures of your family and friends in daylight is easy. Taking great shots of them outdoors at night is a more interesting challenge. But that’s what I’d like you to do for this assignment: Grab your camera (and your accessory flash, if you own one) and a willing human subject, and head outside after sunset. Take a portrait that balances the flash and the existing light. Be sure to study your camera and flash manuals the night before.
I shot this photo of a street performer in Paris early one evening after watching him perform his wonderful clown-like routines for more than an hour. The sun set during his performance and the only light remaining was that in the twilight sky behind him, so I turned on the built-in flash and motioned to him to pose briefly. It took me literally seconds to compose and shoot the scene and then he drifted back into the evening. A great moment for me, and I like the photo a great deal. Taken with an 18-70mm Nikkor zoom lens and exposed for 1/60 sec. at f/4, ISO 200, handheld, using on-camera flash.