Things like this will certainly gain you more respect.
Of course. That's the whole point of the off-topic section.
Why would you want to? Like I said, it's completely unrelated to this site. If you're going to spend your time mostly making a topic unrelated to the site, why be here? It's fine to post in the off-topic section, but this is like a community here. It shouldn't be something you're proud of.
I'm afraid this logic doesn't actually work, as if it did then critics wouldn't exist because they would have to give a perfect rating to everything. As long as you can have your positive opinion, I can have my negative opinion. And you shouldn't get so offended over someone's opinion. That's what caused big issues here before.