For some weird reason i like filling out polls and questionnaires, so the more the better

Well, to each their own kink.

About the possible romances, Larian said that "most" companions can be romanced, right? Or am i misremembering?
So my guess would be that either Minsc or Jaheira or possibly both of them can't be romanced..
I decided to put all the Companions in the list for "which Companion romances are you interested in exploring ?", as I thought that was the best I could do with incomplete information. Likewise, I decided to not include any Non-Companion romance. I would expect the game to contain a good few small (or perhaps not so small) romances with Non-Companion characters, from prostitutes in Baldur's Gate to casual encounters/hook-ups with NPCs we interact with a bit more (e.g. Lakrissa, Aradin, etc). But I don't know who. In retrospect, I could have added an option titled "Non-Companion romances/encounters (if any exist)". Too late now.
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Edit :
There's a certain symmetry to having neither legacy character be romanceable, and blocking Minsc but allowing Jaheira would also unbalance the numbers--which Larian seams loath to do.
It is true that currently there is 5 Males and 5 Females balance among the Companions. And perhaps there is also a Male-Female balance among romanceable Companions. But if we look at the Races of the Companions, we see that Larian made the 10 Tall Races (3 Humans, 3 Elves, 2 Half-Elves, 1 Tiefling, 1 Githyanki) and 0 Short Races. So their concern for balance or symmetry seems very variable.
PS : damn that slow/unresponsive forum.