I've been several times in a situation where I want to lockpick a safe (for the XP) but I've already picked up the key! Since you can't drop keys, the XP is therefore lost. And even if you could, it's a pain in the a** to find the right key. What if there was a mod were you could choose to lockpick or use the key (say E for use key and R for lockpick) and the same thing with use password or hack?