Unit 64 and 65 content / style of my work and problems encounter with my work

My work consists of 3D models and animations that try to keep to the principles of animation, one of which is a simple animation of a bouncing ball going down a set of stairs, each video of the animation and models are 8 seconds long and give a good view of the animation. Most of my work has been textured as well using simple wood and metal textures but the shapes can be very simple.

I encountered many problems when creating the 3D character, the modelling itself was difficult since I would extrude the shape in one viewport to fit the concept art, but forget to do it in another viewport later on. I resolved this through repetition and finally remembered to do this in all viewports and not just one. I also had trouble matching up the character evenly on both the left and right hand sights, I resolved this by deleting one side of the character and using the mirror tool to create the other half to match the character. I also had problems lining up the bones to the character mesh with the bones not attaching to the correct portion of the mesh, this was resolved by reducing a bones influence to different parts of the mesh using the weight tool to reduce and increase its weight on the mesh.