OK. I’m gonna post some feed back on this image. Please bear in mind this IS constructive criticism and I’m not picking holes for the sake of it (that and you asked me to comment
)
Firstly the PPG Style version.,,
I can say this with some authority (as I have had my own attempts at PPG style character repeatedly bounced by Cartoon Network themselves) that your PPG Style version is totally off model. The head is a ball not a ellipse (52 degree ellipse to be precise), the eyes are not big enough and don’t sit in the right position. The body is too big ( by some way) and the legs shouldn’t meet in the middle. The arms are like sussages where that should be more knife like (straight on the inside and curved on the outside) The hair is harder co comment on but would probably be rejected because the fringe breaks the line of the head. The hair at the back would probably have to hang vertically. This version is closer to South Park than it is PPG.
Probably seems a tad harsh but that would be the feedback you would get from CN themselves. And I have been in the end of similar lists myself; so don’t feel too hard done by. :D
As to the Bleedman Style variant. It is again way off model.
To be honest the best thing you can do to improve your art is to spend several months copping images from artists you admire the style of. I don’t mean trace. But copy by hand (use grids to help you to start with). It’s not cheating to copy someone’s art. It’s only cheating if you try and pass it off as your own original work. It is a valuable tool as you are learning how to make the right shapes, simply by trying to reproduce them 100% . The more you do this the more your arm and hand will remember how to make those shapes (muscle memory) and you will get better..
Also observe everything around you keep a sketchbook and draw all that you see. There is NO quick fix. There is NO simple method to getting good other than looking observing reproducing and repetition. Reference is key an practice can never be understated. If you want to get good then it is gonna take hours and hours and hours of practice and observation…
Probably not what you wanted to hear but it IS gonna help you in the long run
You have permission to re-produce and of my images should you wish. I would be interested in seeing how close you can get (remember no tracing….)
) I can all but concur with you're speech Mr. Ohnhai, but honestly you put me to sleep..... 
in the process. If you have the the man trying so hard simply to emulate a style, then what's the point? He should pace himself, and even though it may not be accurate at first, see it for what it's worth and keep on moving. (If you put your work down too much, you'll find that it ain't much fun anymore... 
