In my opinion, these are the most important factors in any character design: color, concept, shape, simplicity, cohesiveness, repeatability, personality and uniqueness.
Color: Any design with colors all over the place creates too many places for the eye to look. Keep your color design very simple and zen. Looking at the colors shouldn't be jarring or confusing. This isn't to say only use one color, not at all, but try to make sure the ones you use are harmonious. Avoid mixing and matching different saturations of the same color or picking colors that clash with one another.
My rule of thumb: Stick to no more than three base colors and some
There is a bunch of things online artist do terribly wrong on a regular basis. Some of it might be directly aimed to you and some might be things you from others.
:bulletblue: Way too little time spend on painting/practice.
:bulletblue: People making nit pick pointers.
:bulletblue: The extreme fuzz about labels and methods.
:bulletblue: Witch-hunting/ talking smack.
However I'd like to start with a totally opposite note:
This year I've also experienced great support from the art community for which I'm dearly grateful for.
~TitusLunter (https://www.deviantart.com/tituslunter) got me an amazing birthday gift(video), made by him and fellow awesome artists: