Lanefan
Victoria Rules
"If it's what the character would do..." shall be the whole of the law. I'm fine with what @Faolyn did here.What this tells me is that we should never, ever sit at the same table.
What I'm hearing is you deliberately ignored the wishes of all the other players at the table who had no interest in your side bar, to the point where you had to "stealth" away from the party and then justify it because your DM panders to this sort of thing by giving you benefits for doing it.
And at some other time it'd likely be you doing your own thing while others stood by. It IME tends to largely even out in the long run...provided players want to have their characters engage with the setting beyond just the adventures it provides, something I take as both expected and a given.As a player at that table, I'd resent every single second that you spent on your sidebar. If it became a habit, I would quit the group. The fact that you care so little about what anyone else thinks is fun, in order to make your own fun the highest priority is the last thing I want from a fellow player.
Leading to the following completely unacceptable sequence:As a DM, my reaction would be, "Ok, you talk to the fortune teller. We'll deal with that over email (or whatever format you care for) during the week between sessions. I would then deliberately turn away from you to the rest of the group and I would not come back to you until after they had dealt with the temple.
During session 1:
Faochar*: takes off to visit the fortune teller
DM: puts that on hold, session continues otherwise (Faochar is absent from the party for a while, then returns) and things progress.
During the week:
DM and Faochar exchange a series of in-character emails during which Faochar learns some vital info from the fortune teller that, had she been able to report it to the rest of the party when she returned during the previous session, would 99.9% certainly have significantly changed how things proceeded afterwards.
Start of session 2:
DM and-or Faochar: Um, sorry guys, but we have to retcon everything that happened last session after Faochar came back from the fortune teller.....
Nope. Infinitely better that Faochar's visit be dealt with when it happens, to preserve in-game sequentiality and avoid retcons.
* - "Faolyn's character".