I don't think he's ugly, he doesn't look bad and seems interesting, unfortunately we don't have much of him (yet).
O yes, beauty - or ugliness - is in the eye of the beholder, so that's why I wrote "in my opinion". I agree with you, he is interesting (and so is Jason Isaacs for me). And to be honest, I would have loved to see a more handsome Gortash with a great, complex story befitting a "veteran British star", with or without a romance or just a little eroticism in the air. I can understand if people find that character interesting and want to explore more.
Doesn't appeal to me, but there are plenty of romance-able characters that aren't generally considered attractive. As long as it's either player-initiated or you can tell him to F- off, like you can't when Mizora starts coming on to you.
Yes, in any case, should be optional, not forced in any way to players who are not interested, or being able to say, what you wrote.