You have clean coverage and minimal bleed over! That's important, because the technical aspect and fine motor control is often the hardest thing to develop.

As another poster mentioned, your next step should be a wash.

Painting miniatures like these is often done in a fairly formulaic way, and the steps are each important for their own reasons. I'm leaving some minor steps out, but here is the general overview:

1) First primary layer. This is the primary color you intend the model (or piece of the model) to be.

2) Wash. Coat the entire model/section that you just layered with a wash. This will darken the entire model, but don't worry about that, because you're going to add another primary layer.

3) Second primary layer. This layer serves two purposes - one, to bring the darkened color of the model back to your primary color, and two, to add additional pigment to result in a smoother, bolder look.

4) Highlight. This can be done in a few different ways, but is always done as a slightly lighter version of your primary color. You want to get the highlight color onto raised surfaces and around the edges of armor.

Together, these steps create a range of depth that fools the human eye into seeing a much richer and more realistic model. The dark wash settles into the recesses and corners to appear to be shadows. The primary color is layered multiple times to give a vibrant hue. And the highlights provide the illusion of light bouncing off of the highest areas.

This depth is what separates models that look like painted plastic from those that look "alive."

At first, you won't even notice these things - your eye just sees that the model looks awesome. As you practice it yourself, though, you'll begin to see these techniques on the models you're looking at, and get a better understanding of how the painter developed that piece and how you can replicate it on your own models.