Yeah, the stamp is terribly overbearing. I recommend reducing it in intensity and size. And maybe make it a little transparent.
Your fashion shots (top row):
First image is good, though the mode is a high too high in the frame.
The other three fashion images are dismal.
The fashion is lost in the bad composition. The black dress disappears into the shadows. And you cut off the model's feet.
We get a better look at the clothing, but the model is terribly wrong for this. She needs makeup, she's hunched over and she looks angry and dour. That's no way to show off the fashion.
In the left image you cut off her hand and that pose highlights the model's biggest faults. The right image is ho-hum.
The sugar skull series (second row):
Excellent makeup, but all need some hairlight or backlight. Too much of them disappears into the background.
Too much blowout. And the guy in the back (white top) is largely lost against the blown-out sky. Either get that light under control or get the band to wear more appropriate clothing.
The piano player image is way too soft and her face needs some postprocessing. The contrast might work here.
Buckethead is in dire need of some fill flash.
You cut off the right guy's feet and there's some nasty lens flare over his face. lots of motion-blur in the left guy. Interesting concept.
She's not only lost against that very busy background, the darkest part of her is lost against the darkest part of the background.
This one's good. Crop a little tighter onto her, but this is good, IMO.