I don't write a lot of comments but do "like" the photos that I like the best so I suppose I am one of those folks to whom this question is directed.
Simple answer is that I don't really have the gear or talent yet to post images worth sharing.
I got into MacRumors in the first place in order to inform myself about Mac computers so that I could help my son choose his first computer (2012 iMac) and then gravitated towards the Digital Video and Digital Photography subforums to learn about cameras, lenses, etc since video production was his area of study and he is using Canon DSLR to shoot with. I've also bought him some gear based on feedback / comments from this and the Digital Video subforums.
I can borrow my son's old camera (T2i), which is far superior to the one in my phone (work Blackberry that in spite of a couple of attempts I have been unable to download a handful of nice pictures from) or the old point and shoot somewhere in my wife's closet, but to be frank my photos suck.
I borrowed the T2i for a work trip to Huntsville AL in December (had to document details of some testing) and thought I'd give it a go at the US Space & Rocket Center which we had hardly any time at all to visit before catching our flight out. Just had the kit lens and ended up leaving the camera on full Auto. The results pale in comparison to what I regularly see in the weekly competitions or POTD thread.
Then there is the second problem of only having the work computer (Windows) as the only practical means of managing or editing photos that are taken, which is neither practical (available software sucks) or appropriate. I do plan on picking up a Macbook Air in the near future and then perhaps I'll feel it worthwhile to start taking my own photos.
With respect to this subforum, I keep up to date with it because the regulars seem like genuinely helpful and encouraging folk - I wouldn't even consider posting anywhere else ... so if nobody minds I'll continue to lurk in the background until if feel I have some photos worth sharing
BTW, the following is probably my favorite photo from that museum visit (Saturn V engine):
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That rocket is truly impressive but it was so large it was difficult to get a decent shot of it.
Cheers,