I think the only things to point out are on the first one, I wish the background behind the figure had a bit more contrast to the sides of the arch pillars. They sort of meld together. Its still an amazing piece. So I am nitpicking here.
I love the crosshatching on the second. I also like how far back the image goes. That amount of detail is what I really get wowd by.
I think something that is more true in the second one, but try to keep the same style going throughout the whole piece. Other than that fantastic work. Keep it up! =]
I think you can really see how much work and care went into the walls on the second one. Overall your work seems like it could use some core practice and it would improve things immensely. What kind of stuff do you want to work on in the future?
I think you have a great sense of the finishing touches to your pieces. But I think you try to do too much for your skill set. IE: trying to included that character in the cathedral picture. or the two dancing on top of the building with all the moons and stars behind the building.
You're definitely talented, you can see that in the coloring on the first one with the man and the dog, but if you added a bit of anatomy study to him and made the forest a bit less flat it would just look amazing.
Thankyou! I'll work on those things, (Anatomy is a big one I'm working on. Perspective too.) I like to push myself by being ambitious in each picture. In a way it helps me because I can see what needs work for next time. Thanks for taking the time to look over the pics.