For me, it is usually some kind of metal….not super original I know, but it is what I listen to. Usually thrashy stuff, but I also like to get a few mid tempo songs in my head before I go to get a good consistent pedal cadence going. I tend to almost always have the Reign In Blood album by Slayer going in my head. Back in my BMX days, (1980’s) it was always hardcore/punk like Suicidal Tendencies, or JFA, or any of the DC area hardcore bands, so I think instinctively that stuff is going through my head when I am “on the edge”