I just had a hill titan come visit my fort.
"A towering feathered rhinoceros beetle. It has wings... Beware its fire!"
Fire. Why ...
I closed up all entrances to the fortress to keep my military from becoming crispy meat in steel cans, and what do you think happened?
That hill titan went straight for the vulcano, diving into it like it was some kind of hot tub in mid winter.
Not sure what exactly it was thinking though siiince...it quickly proved to not be magma proof, melting to death in not too long of a time.
Maybe it just became so depressed when it saw that I close all entrances that it decided that a hot melty !!FUN!! death was the only appropiate way to go for a hill titan.
EDIT:
Ok, trading is nearly impossible in a big fortress with a big tavern. I had my broker "Socialize!" for a long time, then she went to the depot after an eternity, either didn't even make it there or only stayed there very shortly - being interrupted by the need to drink. After that she went and ate something ... then she went to drink AGAIN ... aaaand follow that she is back to "Socialize!"...
Not that I had anything meaningful to trade, just wanted to sell the elves some wooden stuff, but still, this is getting quite a bit too annoying. When I request a trader at the depot that should be higher priority than "Socialize!".
She finally made it just as I'm writing this post. Can't be long before the caravan leaves.