@ryanb: I see your point and my suggestions might indeed not be the best for the community. I do howevery feel (like Minh said) post-back features are lacking. And I'm not sure e-mail notifications will fix that (because I don't want to spam myself with emails if a thread is popular).
I know a ranking system can be misused, but I do feel like the community needs a bigger voice to show what they like. With 'what' I mean what kind of content, what kind of oppinions, what kind of video's. Not "who" , but it can be hard to make that distintion.
If people like a show "Going Deep" , do they like Charles? Or do they like the way Charles askes the questions? It's a hard problem.