For those of you who LOOOOVEEE music and kow some good songs...?

I want to update my ipod and put some new songs on there- but everytime i go to download some music i can only think of a couple songs. I have 100 free songs from itunes- and i listen to just about any type of music, so deciding shouldn't be a problem- but it is! Could you give me a list of a couple songs that you like to listen to in order to give me some ideas? I would really appreciate it! THANKS!