Our favorite among your designs is #47 . Can you work on that design by changing the font to a similar but more interesting style? We like the "simple" styles as you used there but it can be more charming if you can find a more unique or personalized font.
Besides that, the orange color can also be used in a very small detail of the logo. You are free to use it anywhere you want. We would like to see such an alternative in order to make a comparison between your designs.