Some of my Star Wars drawings...more like doodles. (part I )

One of the things I really enjoy is Star Wars. I know that my drawings here are rudimentary, but some are really good, too. I know I can use some improvement with some of the characters, but I wanted to showcase things I like to do, like a solar lens flare with my Vader (left) or the blister card experiment with me as a storm trooper (below left). Also, I have different drawings of Darth Vader on here, but some were just quick sketches and others just for fun. Some of my drawings were for examples and other as gifts. I feel that these are good but I am confident I can do better.
This Vader was a quick sketch for a friend. Blister Card Me as a Stormtrooper.
A 4"x6" sketch of Boba Fett I made for a friend. A Darth Vader I like, I drew.
A quick sketch of Qui Gon Jinn, I drew. A drawing of Luke Skywalker, I drew.
My attempt at drawing Obi Wan Kenobi An attempt to draw Asoka from Clone Wars.
My sketch for Star Wars Day 2010 Vader feeling a presence.
My attempt to draw R2-D2 (2010) Vader feeling blue.
Another Vader I drew for a friend. A Christmas present for my niece.

Sentinel Light Saber designed by Kirk McConnell (AutoCAD) 2007