Ah ok, I was told Dithering was also used to combat banding.
Though I must admit I haven't learned how to AA yet. 
I was focusing my time on other things like shading or palette.

Well, dithering isn't always necessary.

Lots of people prefer just AA and it works out pretty well for them.

The whole point of dithering is to seemingly create more colours than what is actually present in the image and it dealt with colour limitations in older computers.

Now it's more to do with personal style and to challenge oneself by using less colours in a piece of art.

 One day I'd love to do the rest.
My main problem is I actually can't draw, which means sometimes I struggle with simple things. In this case it was his shoulders.

 I'm not sure if this changes anything (or if it was obvious)
But the main or only lightsource (I can't remember, it was while ago)
Is coming from the eyes. that's why it's mainly focused on the front.

And I'm aware of the banding, this is before I knew about dithering. I'm trying really hard to learn how to dither now. But I'm finding it difficult.

Thanks for the feedback! I'll try to use it to improve! :)

 I'd love to see the whole suit.

Nice but it's pillowshaded (light source only affecting the front and nowhere else) and there's very heavy staircase banding on the left side of it's forehead (and a little on the other side too).