I would rather know the hole cards. That way I can play EVERY. SINGLE. STREET. with perfect knowledge of my equity.
It would no longer be gambling, but being the casino - the odds
forever in your favour.
You can value-bet to death with the best hand, never have to pay off a better hand, and get to steal a LOT of pots if you both miss.
Knowing the board gives far less info. Yes, you'll know that your deuces are making a set, but you still don't know if you're going to be up against a stronger set or not. And if you only play when you'll have the nuts, you won't be playing many hands, imo.