Speed Sculpt - Organic Modeling

I'm currently taking Vaughn Smith's Organic Modeling class, and as a first assignment, we were to make the bust of a humanoid character.


I started this yesterday afternoon, finished it this afternoon, and I'm happy with the results, given the time frame.  The sculpt was challenging and, overall, a great learning experience.  It's been a while since I have had to come up with ideas on the fly, and it felt more natural this time around.  I definitely intend on doing more speed sculpts.   
Additionally, I would like to play with render passes in Zbrush/Photoshop to learn how to make quick, presentable versions of this (of course with a quick texture).


Doing this practice also slightly concerns me, because even at this point, I see myself greatly improving past already-completed work I have for Thesis.  I just don't want there to be inconsistencies in my final piece, nor do I want work that is less than my best at the time of graduation.  I anticipate many changes to be made.