Peculiar question, "what style do you play your double kicks on a bass drum." I have never thought of it that way. Well, I don't think of it that way. I think of playing music and if I feel something of a double bass element will fit in what I'm playing (or most importantly---what WE are playing) I'll utilize it. It doesn't matter "what style" of music you're playing, as long as it musically fits the situation.
Work slowly and evenly. Record yourself. Be patient.
My ideas for practice as well as hand foot combinations and double bass I feel are best (and fully) expressed in my DVD, "Methods and Mechanics" which ships world wide to your house directly from:
I hope you decide to pick one up!
I wish you luck with your playing--