Not receiving wips for commissioned art. For a bust or sketch, sure no big, but for anything beyond that? I think a wip is absolutely necessary, no artist (myself included) is ever 100% on getting every aspect of a customer's character perfect on the first try. Sometimes you forget small details, or overlook critical character aspects. A simple WIP can clear that shit right up. Please. Always. Provide. A. WIP!
Artists breaking their own deadlines; ex: expect a wip in X days, the project will be done in X weeks/months. The deadline comes and goes with complete radio silence. Shit happens, sure, but if YOU set the deadline (and tell your customer what it is), and YOU break it, have the courtesy of tossing them a quick note of 'sorry won't be done for XYZ or something came up, it'll take longer). Or better yet, please don't set one at all unless you're going to stick to it! You save everyone a lot of trouble if you refrain from setting these arbitrary deadlines, because 99% of the time when an artist has given me a project deadline? They go bust, every time.
And almost every single one didn't even note me about being unable to make their deadline. :/
After filling out the form and providing outfit refs; and receiving the final artwork, and it's very very clear that the artist not only rushed the piece, but that they traced parts of the photo outfit ref provided. At this point, I don't know if I should bother calling them on it, or just say nothing and put them on my ever-growing list of artists to not-ever-commission-again.