Here's the reason why I won't do some of the requests:
14 years ago
General
Some of the people that requested drawings from me, did nothing but ask, they hadn't talked to me or given me any feedback, and that is not how I'd like it to work. :/
FA+

But I definitely would comment if someone drew my fursona!
Some people don't know how much work is put into art. Or do they even care?
I know there's a lot of ungrateful requesters out there.