Unfortunately, being a popular artist and being a good artist are two very distinct things in the internet, and specially on newgrounds. Many great artists go unnoticed.
Your stuff looks good, you seem to have a decent amount of knowledge on lighting and composition. I'd recommend some thought on how much polish you put on your drawings, and what parts of them get the most work. You seem to put unequal amounts of work in parts of your drawing, some are way more sketchy than others, and while that doesn't necessarily need to be a bad thing (can be a cool way to bring focus to the aspects of your drawing you want people to pay attention to), but that doesn't seem to be the way you are using it.
Also, is the skull thing your signature? make it more discrete, it takes away from the rest of the composition.