Worf's Beard wrote:
Troi might take up Guinan's role serving drinks and listening, while Guinan might make a good counsellor. There, found a use for Troi.
You're right, Troi would be good at working in Ten Forward. I never thought of that. And Guinan would've made a far superior counselor. I think she would've made a great captain too, though. Her character was so underutilized in the show.
O'Brian would've been good at tactical or ops. And his wife is another who would've been good at counseling.