I run the gamut from top to bottom as long as there's new posts in the forums. I do skip some, like that trove of forums in the middle that only get updated by the spammers that slip through the cracks, like Farenheit, E.C.C., Playa Rae's forum, that one forum from Cool Nutz that gets bumped once a year, and umm C-Bo's forum.
All those I overlook because they bore me.