1-Garbage- Garbage is my personal favorite band for personal reasons. Their music helped me deal with some though times. For that they will always be my #1 band.
2-Blondie- I consider Blondie the greatest band ever. No other band could do so many different types of songs and make them great. Punk, bubble gum pop, valets, power pop, reggae, early hip hop. No band can touch that. And if you disagree just have a listen:
http://www.youtube.com/watch?v=weyBdXDg0Ro&fmt=18
3-L7- Maybe the most underrated metal band ever. These chicks rock harder than 95% of the male bands.
4-The Ramones- So many awesome songs. Plus they influenced so many great bands. Rocket to Russia might be my favorite album ever also.
5-The Sounds- The best contemporary band today. I can't wait for their third album.