His style
Baksy was well known for his style that was usually poking fun at hypocrisies in society or other political messages. He really was honest with his art and pulled the cover off of a lot of nonsense that we do not address directly in society. This was part of the reason people liked his work.
They felt refreshed, knowing that there was someone out there who didn’t care about status or fame, they just wanted to do it for the art. That was a rarity in the art industry, seeing how many people love the social status and praise that comes with their highly valued work.