Garran: Ultima 7: Yes, with a few brief plot-related exceptions in The Serpent Isle.
To be honest both games (more so with Ultima 7) party members just does not feel right, Its like in a way this game was originally meant to be a solo character, but with party members tacked on. Did you felt the same playing both games, because they sure are not Baldur's Gate party system thats for sure.
Elmofongo: What the title says because after playing around with them the party member system just feels like a hassle and I rather just go on my own.
VisElEchNon: I know with Ultima VI you MUST have one party member for a bit to get one of the runes. Not sure on VII though.
So is there also a way to ask a party member to leave in Ultima 6? How do you do that (and excluding just getting them killed and leave them for dead)