@phantasico & @Linlay have pretty much said it all. I wanted to draw your attention to your color choices. Specifically where the hand and background colors approach the same color. Some examples:
Your Black Raindrops is a cool background, but the minute hand is nearly impossible to see at certain times. The font is very small and color makes it harder to see as well. Same with Blue Galaxy, the hour hand in Blue, Black, and White Mix and in Coal Dark Mix.
On the other hand, Blue and Black Blocks, Red Blood Dots, Colorful Dots don't have this issue. They look good.
There's nothing wrong with your minimalist style. The style certainly has a large audience. You can try some simple animations. For example: the large circles in Colorful Dots can maybe float around a little. Or some of your text elements in all of your faces could maybe float in from the sides on wake up.
If you are looking for complementary hand colors that will stand out over a background, try putting some of the background colors into a wheel calculator like:
They'll generate some interesting color scheme combinations for you.