[@wanderingwolf] Cool animation, though I do not believe the uninitiated realizes how long it takes to make such a simple animation. Not only the actual animation part, but the time it takes to render the images. More intensive images can take hours to render, especially if you have a lower end computer.

Mind telling me your computer's specs? If you're a fan of the low poly style, you might find some value switching from cycles rendering to evee, (if you haven't already) which I find is MUCH faster and doesn't harm NPR content. Then you could get some free frames if you wanted to use the frames you animated yourself as "key" frames and had blender generate a few in between frames. It would do a lot to make your animation look less like a slide show. If you had access to some 2d tools you could also edit the mouth after the fact, but that's extra and not something I'd consider necessary.