I love how awesome Buggy's become since his reappearance. I mean yeah he started out as a minor comedic villain, but when you think about it; his ability definitely makes him one of the more powerful characters.
Hell, if he hadn't tried using that bomb, he'd probably have been able to beat freaking Mihawk, if only thanks to the fact that he's immune to cutting weapons and thus immune to virtually anything Mihawk could throw at him.
Well, besides smacking him with the side of that huge sword, I guess.