Looking for critique - 3 characters

[Buzuuk]

Hi man ! The only advice I can give you is work anatomy. These characters look cool, but we stop looking as soon as we know anatomy doesnt look real.It looks like you know the general poses, now go deeper and understand how everything move it will give more life :) The hands and feet particulary. Do some studies, it may be boring but will drastically increase your skillz. Keep it up :)