I do think of FFX and X-2 as a single canon, just as I would two books or movies of which one was the sequel to the other. But since my two favorite characters each only appear in one game, they each get to be my favorite for their own game. And now I think I've just nitpicked myself into a corner, so I'll stop now. ;)

I will consider that soapbox. The question is how to express the opinion without pissing off everyone in fandom....