I think most F passengers fit into maybe four basic groups, of course with a few exceptions.
1. Working
2. Sleeping (sometimes the same as 1)
3. Splurging
4. Airline employees

Every airline employee I've seen in F has been well-behaved, more than I can say for the passengers. The "working" group tend not to want to be interrupted and can be abrupt, not rude exactly, but distant. The "sleeping" group sleep, often after the third drink, and don't ask for much. The "splurging" group are who IMHO are most often rude and difficult -- people who don't understand that the folks around them want to work or sleep, and that the FAs aren't just apparatus.

I'm interested in whether FAs categorize passengers in this -- or any other -- way.