Winning a national title in 2000 was both a blessing and a curse for Tom Izzo.
On one hand, he won a title so early in his career that he never really had to worry about that monkey being on his back. On the other hand, he won it so early and hasn't won it again, so he's been heavily criticized for peaking in the early 2000s and being a regional power since. His eight Final Fours kind of put the "regional power" argument to rest, however.
Still, Izzo has gone now 25 years without winning No.