I have a friend who wants to run a game of D&D. I'm rather burnt out on the idea of D&D, so I wanted to find a class that would mix things up and try to make it feel new. I stumbled upon Matt Mercers Blood Hunter, I am a fan of the Witcher series so I thought this would be cool, until I read through the class. There were so many options that relied upon the player knowing what sort of adventure the DM planned to run and quite a few more, that unless you planned your stats perfectly, weren't useful at all.
With this in mind the class as a concept is pretty cool, the specialization options bring some very cool flavor even if two of them mimic other classes.
As a Game Master how far will you bend the campaign to match what the players make? If someone makes a character that will only truly shine if you're fighting the ghosts of elderly goblins, do you add said geriatric goblinoid spectres? Is my knee jerk reaction to you shouldn't give them too much leeway a bad thing or is chasing the awesome they're looking for exactly what an RPG should be?