Those manga guys you love so much (I love them too! shinkawa= the best) have a depth to their style which isn't forced but comes from being a good draughtsman first. The sooner you challenge yourself and stop taking shortcuts and calling it 'style' the better. A good 'stylised' piece doesn't come from the artists shortcoming in draughtsmanship. All those artists you quoted me learnt the fundamentals first, from 1000's of drawings from life i bet. You need to know something before you can simplify it, so many people who like comics and manga miss this point, get to a lifedrawing class. I understand your point about being another Jim Lee clone, I don't want to be that either! But the sloppy style guys (Shinkawa,Wood, Murphy) make it look easy because they can draw like a classical artist first.
Keep ignoring your weaknesses and you might end up the next Liefield instead.
good luck
