If you're looking for great art to inspire RPGing / TTRPGing, check out the Meanwhile Back in Dungeon Tumblr site. I've been following the site for ages. It's amazing.
Just a small sample below (that will update periodically if I coded this right!).
Full Disclosure: To support my addiction...er... hobby, any links to a product are more often than not affiliate links to DriveThruRPG, Amazon, or another site.