You'd be surprised how physical celebs can be. They generally have very aggressive or at least very unchecked personalities. I wouldn't expect Gates to be the type but equally I would not be surprised. Also, Sheldon Cooper isn't real. The bit is a hyperbolic statement for comic effect.
You know what, I am not a fan boy of either Gates or Jobs. In fact badly wanted Microsoft to lose the battle with Google in the early 2000s. Hated Microsoft for Internet Explorer vs Netscape battle in the mid-late 90s. Liked Unix/Linus over Microsoft technology for most of my career, and luckily managed to avoid working on the latter for most of the time.
All that said, one must learn to distinguish between a bad company and a good person (or a person playing different roles). I am a big fan of Gates in his post retirement avatar. He comes across as very earnest and well meaning person. Apart from his role as heading his charity foundation, he has good literary tastes ( picked up 'Guns, Germs and Steel' only based on his reco, about which I posted 9 days ago as well[1]), and a way of finding hidden gems (e.g. he was instrumental in making Khan Academy popular in its earlier years, when one fine day he suddenly mentioned it in one of his talks that he uses that to teach his children).
So its not at all that hacking community are fan boys of all billionaires. Remember he was earlier hated by many. And now loved by many. You should try to be fair in your judgement, that's all.
How "good" he is has nothing to do with his fondness for reading. Everything points to Gates being a guy who just likes to read. Are you going to be equally suspicious to learn that billionaire Zuckerberg likes to play video games or that Sergei Brin likes to buy/get bleeding-edge tech gadgets?
While I understand that it's tempting to blame celebs and young people for the lack of agreement you're finding here, it could also just be that smart, reasonable people find your unfounded beliefs petty and cynical. It's a possibility we shouldn't discount.