http://i61.photobucket.com/albums/h60/frankenstin/e56863f2.jpg
richard dean anderson from stargate sg-1
http://i61.photobucket.com/albums/h60/frankenstin/ac59efd2.jpg
http://i61.photobucket.com/albums/h60/frankenstin/scan0055.jpg
http://i61.photobucket.com/albums/h60/frankenstin/scan0056.jpg
Comic art is difficult to get right without the correct method of inking.. but given the materials you used (a standard marker pen I am guessing) these are nice pieces.. Make sure you rub out your pencil work afterwards.. they will look more proffessional then 
i usually dont ink in markers,lol, these are pulled from my sketchbook,i ink with brushes and use higgins black magic ink,i actually just started penciling a comic working with a pro published comic writer named – devin shane, which ill be inking and coloring,it doesnt have superheroes or aliens its just a crime story/murder noir style story which has been fun, refreshing and pushing my artistic side and style to new levels
btw, i checked out some of your work,really great stuff,bro, your pencil work is amazing