Hard to answer your question. It was built to take down high altitude russian bombers by a small country. It was STOL capable, it was the first military jet fitted with a reverser. You could fuel, rearm and have it in the air again at a roadbase under 10 minutes.
There is all kinds of reasons that makes it special, many are mostly personal from person to person. Like its sound or shape. If you are looking for an answer like it was the best dogfighter of the era or simmilar, then i must dissapoint you. It was not.