I'm basing this off of what Justice Thomas has said when he has been asked about this in the past. But if you want to form your impressions based on your personal biases and prejudices, there's nothing I can say to convince you otherwise.
No bias or prejudice here, just reading his opinions. But think about it for just a minute: there's never a mystery about how he's gonna vote--oral arguments never change his mind. Does that sound like a guy who's listening?
Eh, my impression is that he's extremely arrogant and doesn't care what anyone else thinks. He's deeply uncurious and consequently relatively ignorant. He rarely engages in good faith with the facts and merits, and frequently misconstrues them to suit his own ideology. These are not the acts of an active listener who wants to learn and be shaped by what they learn. They're the acts of someone who believes they've got it all figured out.