Long time reader and I am new to the forum....So I thought I should start a sketch book to jump in to the community.... some stuff I have around at the moment, will post more as more is done.

Always looking for critiques and constructive crits......Thanks.

Welcome Scott, it's cool you're jumping right in! nice one. 

ok my favourite is the middle one, purely because there's more definition in it & it's not as blurry as the other two, they are great ideas, i just think you could push them more, get more values & push the shadows & highlights & it will bring them to a new level, cool stuff though. looking forward to seeing more..