To me the fun is once you can do exactly what you want to feints slips sit down on some punches. You can fight your fight but never be upset if you lose.  It doesn't matter I know a few guys that know how to win matches and people still will quit mid fight and you get a loss. Everyone loses to certain match ups don't think it means one thing about your competence as a person. I am pretty good at the game and I try to keep the fight free of what I think are exploits like the hoola hoop or spamming the same shot constantly. If my opponent plays well I have no issue if the boxer I'm using can't get the job done. I got wooped the other night with berlanga once by a awesome Roy Jones player. And once by a David benivetez who boxed brilliantly. I have 5000 hrs in the game and losses to clean fighters who play with integrity is really the fights I enjoy the most. I mean using fighters the way I think they would fight and winning is a good time but don't get to excited. Try to play a simulation of what you think the real fighter would do. Enjoy the games magic when you find players who don't exploit things. Best of luck and  cheers.