The reason I say Round 2 is because I remember someone had put the exact same topic to discussion years ago. I don't remember how that thread turned out, but I think with Street Fighter 4 (still on a traditional 2D plane) doing the rounds at the moment, standing strong against the likes of Tekken and Soul Calibur, it's time that I brought this up again.
From the Pad vs. Stick thread, I can see that we've got a lot of fighting genre enthusiasts on General Gaming as well.
Me? Personally, I like 3D fighters. The first game I ever bought for myself was Battle Arena Toshinden 3 and Tekken 2 didn't come far behind that. I haven't really played a lot of 2D games like KoF or SF, but I have the utmost respect for people that do because, from the perspective of someone outside looking in, they're much more fast-paced than Tekken or Soul Calibur (the fighting games I play the most these days). I used to play a bit of Samurai Shodown because it was next to the SC2 machine, and I sucked balls at it. . So the first vote goes to 3D.