Is anyone even playing their original Xbox games on their 360's? Is backwards compatibliy even that big of an issue? There are only a very select few original Xbox games that i would even bother playing with nowadays.
Would I be if any of the games I owned were on it? Hell yeah.
The only game that I play on the 360 is Halo 2. I've tried out a few games on the 360, and while Ninja Gaiden (Black) actually has improved graphics on the 360, KOTOR 1 and 2 have their glitches magnified. I'm yet to try the DOAs on it. But I want to play King of Fighters Neowave, Street Fighter Anniversary Collection and Guilty Gear XX #Reload on the 360.
I've been playing Halo 2, and I'm catching up on some titles I missed through rental. I'm interested in going back and trying Psychonauts on a gamepad, since the PC version was all keyboard-and-mouse now that it works. It's a little annoying to have to wait for patches, for each new game, but after that it runs approximately as smoothly as any new game, though rarely much prettier.
I don't play any of my old Xbox games anymore since I have gotten my 360. I was never a big fan of the original Xbox, the only games I played were KOTOR and KOTOR 2.