Terri Windling, who has maintained studios in Arizona, US, and Devon, UK, is one of those individuals.
Seriously--could there be anything more perfect than these images of her working space? The books? The drawings? The tapestry?
(photos from Terri's blog entry, click the link below for the original page and context)
This said--the subject of Terri's post, and the wisdom with which she observes the topic...
"The ability to view one's own work critically is, of course, a necessary skill; but when healthy discernment turns into destructive self-judgment, there is usually a persistent "perfectionism" in the mix....and although some folks boast of this, believe me, perfectionism is Not Your Friend...."
Go and have a read. She's collected a number of people's thoughts on the topic, and a lot of them are good ones--great ones--& inspiring.