What aspects of worldbuilding appeal most to you? The physical geography, developing peoples and letting them spread, devising political games between clones of Europe, or the simple act of creation? Are you interested in making something that is instantly familiar to the traditional fantasy role-playing gamer crowd, the SF crowd, or something else? Do you want to make lots of worlds or go deep on just one world? There are a great many online discussions for the merits of top-down compared to bottom-up worldmaking.