Seems as though they have broadened the rhelm of choices from when I was in the CP. I was in an 8-person room at Chatham so I had a lot of roommates with different roles. I was attractions - LOVED IT!
I worked EPCOT Fastpass (team no longer exists

( ) but I mainly worked the Future-World fastpass attraction entrances and handled the "merge" points for where fastpass would merge with stand-by. I also did the tip booth (the message board behind Spaceship Earth where the maps are) and we also did Illuminations Crowd control since Future World closes at 7. The way they run attractions (or at least did) was that when you clock-in at your location, there is a computer you type your id number into. It would then tell you where to go.....whether it be a person that needs to go on break or you'd get a "bump." If you were to relieve someone for break, your receipt would say, relieve "Mary" at Test Track Stand-By. So you would go to the Test Track Stand-By area and give "Mary" the receipt you printed and she would go back to the computer to print out her break slip with her times. If it would be a "bump" you would initiate a domino effect of positions, starting with the first. You would go to the first position, which I think was HISTA, hand over the bump slip to who was at that position, and they would go to the next and "bump" everyone down the line until the last position where they would most likely go on break. It was a pretty neat system and I am interested to see if it is still the same now. I like it a lot since you are constantly moving, aren't at the same point for more than 20 minutes. When I was there, most "attractions" roles were like this.
I had 3 other roommates in attractions, one was Splash Mountain, another was the Jungle Cruise and the third was It's Tough to be a Bug. One roommate was in Merch at AK in Dinoland and her costume was HORENDOUS! But she was able to stay Seasonal since merch is an easy position to come back to for peak seasons. 2 were Quick Service, one was in the Sunshine Season place in the Land that is COMPLETELY different now and another was at Cosmic Rays. The last roommate was Transportation and she did AK front gate - ticket people. She was the one that checked in a week after 9/11 due to her flight so I am not sure if that was a real Transportation role or not.
After my CP run, I transferred to FT and moved back. At one point I was a V&A's reservationist and we worked close with the GF Concierge. Mainly you are like a "guest relations" for the elite. You handle check-ins and reservations for people in Concierge level. When I was on CP, I think Concierge was an Advanced Internship program so maybe the non-Advanced program would be setting up and cleaning up concierge areas of the resorts. Trying my hand at answering since I have been around the block or two.
Sorry I ended up being so winded.