According to Richard Williams, the master animator and animation director of Roger Rabbit, a walk cycle is one of the most important and difficult stuff to animate. I recently wanted to focus on a walk cycle for an extra practice, but this time instead of being stick to the regular profile view, I went for 3/4 view walk cycle. It was tough and challenging. More importantly it was a great opportunity to study the prespective animation.
Another different point that I tried in this walk cycle was that I used Art Babbitt 's way, starting with down position - weight on the foot, instead of starting with contact position, which is the usual and common way.