Nearly all of us, if not every single one of us, have come across a deviation that just has a disappointing '...'. Conversely, some of us have even come across a massive wall of text.
Whether we are the people who ask ourselves, "Is that it?", or whether we are the people who ask ourselves, "What can I say?", this guide will hopefully provide you with some insight in how to go about writing a good description for your deviations, a.k.a. your Artist's (or Author's) Comments.
IIIXII (https://www.deviantart.com/iiixii) has already written a beautiful guide here. He mentions a great point and that is that your artists comments are the only thing that might motivate a reader