You use some kind of USB Software that you connect to the computer device and you can use that to sketch? Well correct me if im wrong but i guess thats what you use for these kind of sketching graphics. I have this kind of tablet, which comes with some kind of pencil (something which is similar to a mouse and //pad) and i use that to do the same thing because i tried to draw with my mouse and it wouldn't ever work out for me. By the way, if it isn't the USB Software i just told you about, then what do you use because i really love your work, its good that its presented out here, good job mate. Keep it up!

Hope to see some more of your graphic/art work some other time (again!)
Edit: As i have been through your work again, i just came by to modify my post and i've seen how few characters are pencil sketched (real pencils this time

) So, i was wondering if you did this;
1) Sketch on paper
2) Take photo of sketch
3) Move sketch to computer device
4) Open sketch on PhotoShop
5) Edit sketch
6) Add colors to sketch
7) Make sketch 3D/realistic animation
....
More and more but for now lets stick with these, because for me, its impossible to sketch something on PhotoShop without some kind of tool help. (Besides the pencil tool) Lol. Or it may also be a pen!