Hi, just wondering if there is a place I can tweak Vanilla in order to make it take users to the "Categories" page after signing in, rather than the "Discussions" page?

let it default to "discussions" for a couple of weeks. just because phpBB and clones default to a category view doesn't mean it's the right thing to do :)

try it the vanilla way for a while, and you'll prob'ly get used to it...