really nice stuff (: Very vibrant and alive, I really love the colours and almost all of your photoshop studies! Keep it up. Makes me want to improve a heck a lot more ..
Nice studies amigo - got some good stuff going on in here. my only crit for your digitals (which are great btw) is that you should probably add in some solid edges into the painting to give the edge something to rest on while its processing all that texture. If you look at the paintings of craig mullins for examples, he uses a lot of texture for surfaces and hard edges to define form.
Just a thought, hope its useful.