All jokes and generalizations aside, service (as in customer service delivery, not amenities or service levels)lays with the individual regardless of thier seniority, age or background. However, that said, you'll see by my name I'm very proud to have been a "MidAtlantic" F/A because we were known for our positive attitude and considered to be a "class act" by US Airways customers... and we were 1999, 2000, and 2001 seniority. It could be a combination of the training/hiring standards (World Class Carrier, global aspirations) of the time or maybe just plain old cameraderie and pride in our little misunderstood division. Ironically morale was actually pretty great there due to a downright fantastic group of flight crews. The spirit was infectious and you wanted to live up to the level of your co-workers... sometimes the opposite is true at remaining US Airways... it can be hard to rise above the rest and easy to be dragged down.
I prefer to fly A unless a friend is on the trip with me. Most trips I generally am A, it just depends on the others and what they like. Some like it, some don't. It depends on the airplane, but usually the laziest position is the most senior (the C) and the one with the most 'work' (A or B, galley positions) is the most junior. On the 757 D usually goes junior because alot of people don't like to stand at the door and say hello and goodbye to passengers. I like to be out in the aisle with as much human interaction as possible and not stuck in a galley, other people are the complete opposite. We really dont have a huge variety of positions, aircraft types, or service- we mostly fly narrowbodies with three positions doing a beverage service so there's not any huge differences in position. Theres no real rule of thumb for what goes senior or junior, its more a personal preference.
