Brompton: getting feedback

I find after working on a project for a few weeks you start becoming blind to some errors or bits that could easily be made better so I always try to get feedback on my work both from tutors and class mates. The feedback was generally very positive however both tutor and student said that the character could be a bit more "animated" to give it a little more life. A couple of suggestions where to try and make the character look around and to have the character speed up and slow down. I didn't want to have to do any frame by frame animation as this would have stuck out a lot so i needed to find a solutions in after effects. The speeding up and slowing down was the easier task, I just used the time remapping function to alter the speed of a cycle. Since the animation was split into 2 second loops of the bike ride I could easily split one up. The second solution was a bit tricker and required futher research. I tried just moving the eyes and facial features but it didn't look right, I also tried tilting the head as a 3D layer but it made the head look very 2 dimensional. I found online a method which involved warping the head with the liquify effect which made it look like the head was moving slightly in one direction. By controlling the amount of distortion (from 0 - 100 %) I could have a gradual heat tilt in multiple directions which looked 3D. Adding these made the animation a lot more gave the animation a lot more character.