With a deal it will depend on the deal.
Without a deal we still regain sovereignty, the right to make our own rules via our government without bring overruled, and the right to trade the world over on terms agreed with trading partners without EU interference, and we will be able to consider ourselves a proper nation again the very minimum we need to have a normal nation, which we presently lack now. That'll do for starters, although this has all been discussed many times before. I suspect it's only brought up again so remainers have the opportunity to pretend that there is nothing, because they choose to be deaf and blind to answers given to this question.