They're a bunch of cuties! I love the flowy design of their outfit, and the ears are cute. Favorite color scheme of mine would be top-middle, bottom-middle, bottom-left, and left-middle.
As for your body text, it made me skulk around your art so far. You're a really accomplished professional talent! You already have an enviable rate of production. Maybe take a break for a little bit, and emerge from that break by exploring what you haven't explored yet. Build upon styles and concepts you have not yet addressed. Challenge yourself.
What is your weakpoint? Practice by strenghtening it.
Is it environments? Perspective landscapes? Particular anatomy to a particular gender? Mechanical art? Structural art? Abstract? Realism? Historical murals? High-concept fantasy or sci-fi? Still-life? Etc...
Switching channels like that could help you grow as an artist, and when you've hit a wall with experimentation, switch back to formula to keep the ball rolling. You have the skill and the experience to guide your skills into previously unfathomable levels.