Hi Andy -
Before I answer, please just let me say that I'm more than happy answering as many questions as folks want to ask!
The great thing about working with Mark has always been that I have a real say in the story lines without having to do the hard bit (typing in my case). I really feel I get the best of both worlds as I get to come up with story ideas and discuss Mark's ideas AND draw the book (which is the best fun). I do enjoy writing and have really enjoyed seeing how other people interpretted my scripts in the past - my favorite probably being the L.E.G.I.O.N. annual Mike McKone and I did together.
However it's the collaborative part of comics creation that I really enjoy so I don't often like to write and draw a book.
With LSH I feel I do have a real 'ownership' of the characters with Mark, but where he has control over their words I have control of their look and body language - it's a real partbership that I think works very well for both of us. It certainly adds an element of fun to the process!
As you can probably tell from the notes on the character sketches I've posted we swap ideas without reservation.
Hope that's an answer that makes some sense!