I don't even know what he has been doing in the 2000s, I didn't hear much about him after the Tim Burton Batman movie, and the "hey I'm a sign!" thing.
I always considered Prince even odder fellow than M. Jackson. He certainly had talent as a musician no doubt about that, but I also felt he was a bit too full of himself (a real diva if you will), like with that sign name thing. I also vividly remember that when the
"We Are The World!" thing was made, who didn't participate... yep, Prince. Not sure why, but I figured he felt he is too big of a star to sing together with mere mortals like Michael Jackson, Tina Turner and about every other renowned US singer from the 80s.
Still, and interesting and important artist to be sure.