Decided I might jump in on this one. The following three songs are, in my opinion, well suited for their related activities.
At the gym on heavy lift days: Disturbed "Droppin' Plates"
-http://www.youtube.com/watch?v=vpL2sWLwEtU&feature=related
On long runs/rucks: Stevie Ray Vaughn "Texas Flood" (Hence my name)
-http://www.youtube.com/watch?v=tWLw7nozO_U
Hitting the bag: Godsmack "Bad Religion"
-http://www.youtube.com/watch?v=OalFCKXFZBE&feature=related
A popular song with a couple of guys I lift with is "Indestructible" by Disturbed.
http://www.youtube.com/watch?v=jx4rMVCAdHw
However, if Im out training in the woods, I find that no music is the best music, especially in early June.