Currently doing exactly that, too, but not very happy with it. - As I'm currently trying to get more into web development and looking for a sideproject I though

Currently doing exactly that, too, but not very happy with it. - As I'm currently trying to get more into web development and looking for a sideproject I thought doing a "Trello clone" focused on this particular approach could be fun. Any non-obvious, specific features you would like to have?