Thank you! I know Zrbush and Mudbox. Both are really good apps. You are right about zbrush's interface and workflow. It was hard to learn at start but after a time it becomes easier on the brain.
Mudbox is a lot easier to learn. It took me a few hours to go from navigating and basic sculpting to baking maps and texturing. Anyway the stuff in my sketchbook are in sculptris because I like the program, mainly because of the care free sculpting. It offers a lot of freedom for sculpting and concepting. I will start a few more serious projects and I'll make them in Zbrush, like I did with the creature from the black lagoon. Anyway still rocking with Sculptris for now just for fun. For serious stuff I use Zbrush.
About me understanding anatomy... I try to use reference as often as I can. I mean i do anatomy studies on the side, mainly learning the muscles of the human body.
Anyway here is a quick sculpt using Sculptris Alpha 6.