Clicking between the grand total of three categories (data/inventory/stats I think), and then picking which thing you need from there (quests/maps/radio in data, the various types of equipment and your character sheet) is not that clunky.
At least Fallout 3 (and Oblivion for that matter, though that menu was more complex) has everything streamlined and in the one UI. So many games separate the various menus, which I think is more of a chore. Take Red Dead Redemption, one of my favourite games. On PS3, which is what I got it for, there's the Inventory with the select button, and everything else on start. Maps and quests were lumped in with the game options, and the inventory was on its own, which I found more than a little odd and counter-intuitive.
Why exactly should the world map be on the same screen that lets me adjust the graphics settings and enter multiplayer mode? Things relevant to the character (maps, quests, items, stats) make sense to be in one menu, things relevant to the player (options, multiplayer mode, save/load) should be in another.
