[WIP] Main Character Walking Animation Thread

Hi everyone, we are a group of friends trying to animate our first ever pixel art character. We animated the three main walk cycles (up, down and side), but we are complete novices to the world of animation. We'd like to have your impressions about it, suggestions and critiques are welcome.
Thanks in advance!

PS: Each walking cycle has two different versions, which one do you prefer the most?

Edited by: InfinityExperience