If you're at all interested in the discussion of Magic art, then you'll likely be interested in the Original Magic Art blog. Currently, the blog is running a poll asking readers which MM15 cards had better original art and which have improved in their new form. You can vote in these polls here.
For whatever reason, I usually find myself favoring original art. This is no doubt in part due to nostalgia established by the original printings- though I'm much less likely to care on cards that I would never play with/ aren't Meddling Mage. And then in some cases the new art just baffles me. Specifically, I wouldn't feel the need to spend money on this:
When I already had the rights to this:
Ultimately discussions like this probably aren't for people like me, as the first example of new art that I like that I could think of was the new Summit Prowler. It's still fun to compare the "new hotness" to the " classic genius" though.