1999-2004 is still my favorite period in music. The Urban domination was everything. I know a lot of people hated it, but so many of those songs have held up so well and are still bumped in the clubs constantly.
Some of my faves from that era:
Hot In Herre
What's Luv (absolute classic and gets so much club play still)
Always On Time
In Da Club
Crazy In Love
Right Thurr
Lean Back
Goodies
Yeah
Drop It Like It's Hot
Get Low
never change 
