I used to do everything with markers and conte, but nowadays I either use a combination or 100% photoshop. It's far cheaper, and you can make changes so easily it's far more productive.

Below are some pretty old sketches (I think the quick Enzo one dates from around 2000) - these were entirely marker and conte based.





And then of course - my "telephone and meeting sketches"!! I do these before nodding off to sleep much to the amusement of others!!!



I also do the odd rendering (for owners, etc) on commission, but only if I can find the time. At the moment it's sadly impossible for me to do this...