I just wanted to put it out there that the English dub version of Yusuke is easily top 25 material in my book. [On a side note, I also noticed that Yusuke seems to have a lot more of a "mischevious" sort of attitude to him in the manga than in the anime; well, I couldn't come up with a better word to describe it, anyways.]
Of course, I agree that he's not exactly top 25 material, but hey, if Ichigo could make the list, then IGN has no excuse for why a much more interesting character than him could've made it, which Yusuke is to me, in this case. That said, if any YYH character were to make it into the top 25, I'd honestly say that Kurama deserves the spot. Unlike most of the "bishounen smart guy" characters that we see in most shounen these days, Kurama actually pulls the role off right (IMO), and he actually manages to be clever with his plans, rather than other characters of his type in other series. I mean the ones who always seem to be one step ahead by default with some convoluted scheme that is just there to throw-off the viewers into thinking that its an intelligent plan since the writers couldn't come up with something better.
Not for someone who's not a fan of Code Geass, though. And just for the record, I really dislike Light, but I won't deny him his place as a great anime villain.