This thread here Is a good thread, Wanted to keep my post as I thought it was a good answer and it gives details of what sort of music I am into.

Depends on what sort of mood I am in,
If I am in a Confident Mood Then Bob Seager - Like A Rock.
If I am in a Mood for Lovin Then Bob Seager - We've Got Tonight,  The Doors - Light My Fire The Doors - Love Her Madly
If I am in a Chiilin sort of Mood  Then The Doors - Riders On The Storm or Hollie Smith - I Will Do or The Wallflowers - One Headlight
If I am in a Shitty Mood Then Staind - Outside or Staind - It's Been Awhile or The Beatles - While My Guitar Gently Sleeps ATU Version
Of course there is more, and here are songs that just play in my head atm Billy Talent - Rusted From The Rain or Placebo - For What It's Worth or Rise Against - Hero Of War,

Some other songs that I can't be fucked to Categorize are
Th' Dude's - Be Mine Tonight,
Eskimo Joe - Breaking Up, How Does It Feel, Beating Like A Drum, This Is Pressure, Comfort You, Foreign Land
Supertramp That will go on forever They Made songs that I have in my head all the time
Foo Fighters  - Too many too mention here
The Beatles and The Stones  -  Too many to mention here
And so on and so on.

And BTW if ya think well hang on It's theme song not what songs do you play in ya head well These few are my Theme songs.
Hans Zimmer - Injection and Clint Mansell - Death Is The Road To Awe - The Last Man

And to those that say that you can only have one song Fuck Off, the three that I have Chosen for my Themes are that and all those ones about my mood are the songs that play in the TV show that is my life, You have to have filler.