Yes I pronounced the lines a bit stronger than initially wanted.
You can also leave out the shadwos I drew around some lines,
and draw the contours with a less contrasting color.

The good thing about outlines is that they define your Model
clearly by showing the elements its "made of". Making the Characters
well defined when they are not big on the screen.
(good contrast)

And making the contours them out of relatively straight lines fits very well with the low poly approach.

Best of all: the workload per model/Texture is quite low, and managable without having strong artistic 3D modelling experience.
So you can get your assets done in a reasonable time.

The artstyle in "Fat princess" looks very nice :=