I put in an "Attend Meeting" in place of "No Job" a long time ago at somebody's request, at least for the dwarf that initiated the meeting with noble/appointee. The noble running the meeting doesn't currently have something written, but I can change that. Dunno why I didn't in the first place. Probably because they can do other things when somebody's trying to meet up with them.
Right now personality traits just do what I needed them to do, which is handle which conversation skills are used during meetings. Later on they'll control which friendships/grudges are formed (right now they just make buddies with everybody they meet a certain number of times), how tantrums work, how they do their jobs, and whatever millions of other things makes sense. All of it will be added over time, but not very much will go in this time around. I was just irritated that every time somebody tried to calm somebody down or took/gave a work request, they became a dabbling liar.
The dwarves cannot currently refine aluminum from something like bauxite. The only process I've heard about involves lots of electricity. Native aluminum is very rare, but apparently you can find it in certain oxygen-low environments -- here's a very small amount from a mud volcano. I dunno what the largest chunk ever found was, perhaps no larger than those specks, but that's the current state of affairs.
I think my kidney is fine.