1. Not usually. In my forts, unless you'd count walling in a large area of ground for farming, the largest room I'll have is the dining hall.
2. Even mature forts will often have a major dorm despite everyone having rooms. If I start suspecting that there be vampires around or anything.. I jsut lock the doors to the bedroom floors (theres some food stored in them, anyone left in them will survive a couple months) and everyone else gets the dorms for a few months until the problem is sorted out.
Also barracks, hospital, things like that.
3. Dunno what you mean by this.
4. Actually, aside from raw food, prepared food, and booze... Most things don't ever see a stockpile, as its often just fine to leave them sitting in the workshop.
Food you kinda have to, else it'll rot. But for example, take the clothing industry. You have a farmers workshop surrounded in stockpile that fills with pigtails/cloth plant. Directly next to that you drop the loom so the loom worker only has to walk 4 tiles for thread from the FW. Then you put the dyer next to that, and then the clothing shop. None of the workers have any notable distance to go to get materials... other than the initial plants, hence the stockpile. Often the only other stockpiles I might have, are stone ones set up for "metal" stone types near metalworking. And some wood piles near the woodburners, so the burner works full time, and doesn't have to go running for materials.
5. ??
6. Prepared food, wooden/glass trap components. I rarely trade away anything that's not a renewable resource.
7. By the time I'm into nobles, I've usually already got just about everything physically possible to stick into a fort.
8. All the time. Since once stuff is up and running well... you can often leave the game unattended past the occasional thief, or caravan. Esp since the game runs like crap on my toaster.