So I recently upgraded my mobile phone to a Samsung Galaxy Note 4 and felt obliged to get comfortable wielding the S Pen (since it was one of the reasons why I bought it). I downloaded the free Artflow app and thought it would be cool to sketch characters from movies and TV shows that had left a lasting impression on me since way back when. First set is Watts from "Some Kind of Wonderful", Marty from "Back to the Future", Mulder and Scully from "The X-Files" and Luke from "Star Wars". Each of them was done at an original resolution of 1440 x 2560, took between 30 minutes to an hour to complete and referenced from an image online. I'm pretty happy with how they're turning out so far and hope I can keep doing them. Slightly bigger versions are in my Digital Art page.
Sketched portraits of 3 cosplayers at Render 2012. Done in pencil each sitting around 10-15 minutes.
Dug up a bunch of portrait sketches I did during Render 2011 and compiled them. Done in pen, each drawing took around 10-15 minutes.