Hey, thanks man! Much appreciated, and glad you like my work
I use a variety of graphite pencils from B through to 8B for pencil drawings, and a variety of ink pens from .005-.08, and thicker black markers for larger dark areas. I do all my initial sketches with a mechanical pencil.
Danny Kavadlo is a personal trainer in New York who specializes in bodyweight calisthenics. I've done illustrations for several of his books, and the drawings of him I've included in my gallery are of those. He's a great guy - quite a character and you'll find plenty of his stuff online if you search Google and YouTube for his name. His brother Al Kavadlo does the same thing. I've been in touch with Al on and off but haven't done any illustration work for him.
Anyway, have a blessed Easter, and thanks again for the great feedback!