>>11954415
I think Super Metroid has the best "boss explodes upon death". Every explosion sounds so god damn violent and bosses tend to roar their guts out before falling apart or sinking to the boss of the screen. It really gives that "Yeah, I killed that giant motherfucker." feeling.
Mega Man X does it well too in a more cinematic sense, with the music fading out after the last hit and the screen going white, but it gets kind of repetitive with how often you kill bosses in that game.