I don't know much about the Roegadyn, but in my experience, nothing is stopping you from making your character's personality into whatever you want it to be for the sake of being unique.
In a lot of games, certain races have tropes and consistencies that each person follows, and yet in most cases I've been able to find the odd one out that doesn't really follow any of them, which is what makes that character interesting. i.e.: "I thought all dwarves had thick accents and drank all the time?"
The key is to keep it realistic, because going too far out of bounds is more detrimental to your character than anything. In the Roegadyn's case, being Hellsguard and preferring cooler temperatures is pretty contradictive, but maybe your character does so simply because they've lived too long in extreme heat?
In a lot of games, certain races have tropes and consistencies that each person follows, and yet in most cases I've been able to find the odd one out that doesn't really follow any of them, which is what makes that character interesting. i.e.: "I thought all dwarves had thick accents and drank all the time?"
The key is to keep it realistic, because going too far out of bounds is more detrimental to your character than anything. In the Roegadyn's case, being Hellsguard and preferring cooler temperatures is pretty contradictive, but maybe your character does so simply because they've lived too long in extreme heat?