Do not take this the wrong way, I'm just trying to help you out
I think they're boring, the show no originality. There is no blending and the backgrounds look bland and plain. Watch a few tutorials about blending and smudging, also a bit on blending. After that, move on to lighting/glow effects. If you watch two tutorials a day for a week, you'll drastically improve.
Sorry if I came off harsh mate, but you'll get nowhere if I just say they're nice or good.
Other than that, practice and prosper. Goodluck