As a fairly regular poster, I'm running out of superlatives for all the great work here. When forum users post individual photos or a small group of photos, I find I'm looking at them, enjoying them immensely, but not commenting as what I have to say has already been said. "+1s" could be replaced by a simple click on a "Like".
Of course, perhaps, there's no need to repetitively affirm the quality of a photo or photos. It's just nice to be able to acknowledge quality work. Is it too glib to simply "like" rather than add a true compliment?