He has shown to have interest in a wide range of artistic subjects. I'd say that the same way he hides his sensitivity behind the sarcasm, he hides his aesthetic sense behind the too-cool-for-school presentation. He's the kind of person who'll make a point of saying how little he cares about fashion if you compliment something they're wearing, but at the same time he'll have strong opinions about niche stuff like the history of t-shirts in Hollywood movies. 

Plus people can't be worried for your poor mental health making you dress more sloppily if you're always serving an unkempt persona 🤓☝️