At the moment I'm spending more time on this board than anywhere else mainly I think because a lot of my friends are posting/repling, and I'm nosey so I want to see what they have to say.
Generally though prefer chat, especially if I have time to waste, as I enjoy the atmosphere in there, though I normally get carried away and spend way longer in there than I mean to.
The OF MB is the first place I look when I get WoTmania in the mornings (or afternoons/evenings - when ever I get to WoTmania of a day), though there's rarely more than 4/5 posts that I read there, and I only check once a day.