Compounding the various other UI issues (which have their own thread), key bindings are a godawful mess.
All the configurable binding options refer to game mode functions, but
most of them also apply to the menu functions which use the same key. For instance, "ready weapon" is R -- rebinding it also changes the key used to drop an item from inventory. (It does NOT change the "take all" key when looting. That's one of the "exception" keys which simply can't be re-bound.)
The key icons within the menus that tell you which key does which function are
sometimes accurate to current key bindings, but sometimes show defaults. It depends on the specific menu and key.
"Set Favorite" (which is also "Toggle FOV") has a fun little glitch: it doesn't work for items if you set it to T. (Still works for spells.) May or may not have similar issues on other keys, dunno... I've got it parked on Z right now and that works.
I mentioned that R for "take all" is immutable. This closes the container and returns you to game mode... where, near as I can tell, the R registers and only
some of the standard binds know to ignore it because you were just in a container. I haven't checked everything, but "Ready" (the default R bind) is OK, as is Auto-Move. Toggle POV and
(...goddammit...) Use Power, however, trigger instantly.
There is, as far as I can tell, no keybind at all for the Yes/No prompt. (Also no quantity dialog for crafting. This makes smelting just a wee bit tedious.)
I'm sure there's more but I'm honestly trying to play the game this time.
Farthest I ever got in Oblivion was closing the Kvatch gate, never even found Martin... 