Simple rules: 
Track is predominantly vocal and the intro is at least 30 seconds long before any singing starts.

1990s - Fairly obvious choice here with some 'Smells Like Teen Spirit' from Nirvana. Hello, hello >

Honourable mention for the 90s goes to >>>  The Foo Fighters and their 1997 track 'Everlong'. Dave Grohl again.

2000s - Firmly in my kids music territory now, full on. 

[Warning: this track's video is from the movie 'Jackass' and comes with a PG rating 😬]  As crazy Andrew W.K. sings 'We Want Fun' > love it

Honourable mention for the 00s is >>>  Creed and 'My Sacrifice'. Plus Andrew W.K. is a bit of a specialist in the art of rousing intros: check out > 'Ready To Die'; 'She is Beautiful'; 'I Get Wet' or 'The End of our Lives', for good measure.  

That's my selection for you. Did I miss any of your favourites ?