Are you a fan of the comics or the movie? Because to me, this more resembles the Hellboy from the movie rather then the Mike Mignolia Hellboy.
But what do I know, I haven't even gotten into the comics yet.
I love Hellboy!
Im a huge fan of the comics. I enjoyed to movie to a certain degree but the comics are what really do it for me. Mike Mignola is an absolute genius. Do yourself a favor and jump in. Try and start at the beginning though so you really get a feel for the character as Mignola progresses the stories. Enjoy and thanks!
Ahh...I see what you mean. I basically just start out with a rough gesture drawing, basically what you see on the left. I do use various shapes to define the form but my technique is mostly spontaneous. Thats probably not much help. 8)