Now tell me where did my hands went wrong ?

wow.. hands are always pretty difficult to draw
these look great!

thanks , more critiques than comments ?

The fingers on the first one (top left) are a bit skinny, but otherwise they're all pretty great. good work

Middle knuckle on the fist bothers me a bit, but otherwise they are all excellent.

Thumbs and generally the proportion of the fingers. Nice style btw.