I like fighting the dragons, it's always something else then the ordinary game. I am still going for a complete good game, so like all the dragons beaten, everybody learned all the magic stuff, all the relics, all Gau's rages etc.

Plus you get a very cool Summon if you beat the 8 dragons.

I agree also with Storm. The Storm Dragon is the hardest dragon in the game, it was the last one I beaten before visiting Kefka's tower. There is however one dragon you never wished you met. I don't know if he is by the eight dragons, but I met him on the Feldt. His name was Doom Dragon. He's really annoying, he has strong attacks and uses Fallen One. So, my party was just slaughtered