would you mind doing less updates, but with more content in one post? To me it starts to look like you try to bump your sketchbook. I don't know if that's your intention, but in the end all of us want our stuff to be seen and commented.
The drawing of the tiger looks nice. Like the linework a lot. Maybe you could've done the even background a bit with drawn details. At least I don't think that the messy digital editing is adding something useful to the picture.
The study of the jug is showing some good things too. But try to keep an eye on the geometry, may flip it to see flaws easier. But I like it that you try to keep the brushstrokes simple. Keep it up! I want more of such studies =)