I got all butthurt when my posts were removed, but I think I know why now and have gotten over my anal pain. They were Skyrim posed shots with texture mods etc. and I felt they weren't all that bad - but were deleted for not meeting quality standards. At least that's what it indicated when I tried to display them.
However, I think now I see the real reason. On the Posting Guildlines https://e621.net/wiki/show?title=uploading_guidelines it says this:
Bad things to upload:
Screen captures: Screenshots from games, still images from movies, video snippets from youtube, etc. etc
But on the Avoid Posting list here:
https://e621.net/wiki/show?title=avoid_posting
it doesn't mention that restriction.
Now I have seen Skyrim captures here, but I'll be the first to admit they are mostly far and away more unique than mine were. This is probably the most borderline I've found.
https://e621.net/post/show/451741/16-9-3d_-artwork-anthro-areola-argonian-black_scal
For that matter, there's plenty of GMOD stuff that frankly looks godawful IMHO which also seems like it would fall under that category.
Anyway, I'm over my butthurt now and fine with it. Maybe someday I'll have something that may be exceptional enough to warrant and I'll try again. But I do think it would be good to update the Avoid Posting to mention screenshots so as to be consistent anyway. I understand the reasoning, even if I may not totally agree with it - but your playground, your rules.
Updated