On the flip side, I've had authors say "PLZ GIVE ME CONCRIT" and so I've spent hours of my time reading and editing and concriting works that I loved and wanted to see improved, only to get no reply, or rants in return. I can be a somewhat hard "beta" but if we/the POV character knows the other guy's name, there's basically no reason to use, for example, "the Asian boy" instead of calling him "George." Epithets are not cool. No matter how many justification excuses the author comes up with makes that less so.

So, as a result, I often don't offer to give concrit any more because it ends up being a waste of my time and the author doesn't actually want concrit; s/he just wants praise. But hey, if you mean it and don't write absolute crap and we have remotely overlapping fandoms, I might give it a try.