I mean, every-time I spar someone, and I see they have a certain style, I change my style to a style that would give their style all sorts of problems. I've got power but I usually box. When I fight a swarmer, I slug and it hurts them. Slugger > Swarmer. When I fight those damn counter-punchers, I swarm them, bob and weave, etc. And it works. Is this is a bad method? Changing my style just so it works around their weaknesses?
If it works its a good thing. Its good to be able to adjust. But if you went up in level it might be a case of jack of all trades master of none.