there are a lot of great posters on gaf, but most posters aren't as popular(?) as the narcissists who activity deter any discussion from an opposing view. you end up with posters who're overwhelmingly positive in Nintendo/Sony threads, but overwhelmingly negative in Sony/Nintendo threads; same with PC/Consoles, 'dudebro'/jrpgs, whatever.
I don't remember who said it, but "Nintendo fans don't like video games, only Nintendo." is perfect. You can swap out Nintendo for any number of things. GAF is great when it's people who like video games talking about video games. and luckily some of the newer mods like stump and y2kev are cool dudes.
it's also a good place for news, but yes, megathreads ruin the flow of new information. title edits have helped.