I find it hard to believe that a game like Xenoblade would be legitimately on anyone's on JRPG list unless they grew up with a Wii. The game is very overrated IMO, and I get the feeling that most people that list it as one of their favorite JRPGs either are young (which I'm not saying is a bad thing) or are so JRPG-starved with their newer consoles that anything looks good. Xenoblade isn't bad, but it's certainly not that great.
Funny, many people could say the same thing about the old classics. CT for example is certainly good, but I wouldn't even put it into my top 5. You know why? There is nothing more subjective than a personal top x list. The order in which you play the various games plays an enormous role for example, no matter how cliche a story is, it might be awesome the first time you hear it. The same goes for graphics and storytelling standards. And when looking back many years, also our personal state of mind at the time when we first play a game will also play a huge factor. None of those things can be objectively weighed against another, they are variables that will be different for every person. Trying to convince someone their choice is wrong is futile, if not even unfair.