These are some of the nicest exmples of coloured sketches I've seen on the forums. You're technique is very strong, it doensn't look to bold or too pencilly (if that's a word).
As people have said you just need to address the composition of your scenes, and maybe think a little more about perspective. Try and think of the balance in a scene. The composition in the first pictur is the strongest - you have a cliff left and centre balanced by an expanse of sky top and right. It works for me!
Try placing furniture and objects into one of your rooms, and don't be afraid of putting objects in the foreground to frame the shot. It's a cinematic technique, but many games to it.
As people have said you just need to address the composition of your scenes, and maybe think a little more about perspective. Try and think of the balance in a scene. The composition in the first pictur is the strongest - you have a cliff left and centre balanced by an expanse of sky top and right. It works for me!
Try placing furniture and objects into one of your rooms, and don't be afraid of putting objects in the foreground to frame the shot. It's a cinematic technique, but many games to it.