No. I'll eat anything, even raw meat.

[He has, actually, eaten raw meat and found nothing absolutely wrong with it. Of course, Byleth had done this when a child, and Jeralt had suitably scolded him for it, since apparently it could make people sick or give them parasites, but personally Byleth had never experienced anything bad from it. He still ate raw fish when he was too lazy to cook them...]

Nothing has ever stood out to me as a 'bad' taste. I'm not sure what people mean by it...