Nice update, I really like the photos, especially the first three.
The digi paint is a nice experimentbut the black band at the bottom is killing depth.
The abstract thing, is not my forte, can't really say much about it.
And the WIP looks promising, too early to call on anything though.
Man I gotta check in here more often, lots of work and improvement all-around!
20 min ps has a great feel to the face, keep workin on using less lines in the process, takes a bit more practice on tablet than with pencil or pen.
Window sill sketch looks nice, like the colours. Its a bit unclear what each object is, maybe push the contrast in the value and edges to get it clearer.
The birthday cards are great, the first one especially has a great graphical feel in the composition and colours! If anything, maybe experiment in being more 'daring' in the way you use the ink and colours to give em more punch. They feel a bit held back in certain areas.
On your digital colour work in general, watch the way you treat the values (usually in imagination work, not as much from life), you're getting a bit of mud, especially in shadow areas. Try not to rely so much on the value scale (black to white) unless dealing with high contrast lighting, and more on the colour and saturation scale (brightness to dullness, and colour choices). For example, look at the way the skintones were treated in yours and in hurri's oc sketches, his shadows rely less on being simply darker values of the light, but have different saturation and colour to them. Also, the highlights are not white, but rather brighter, more saturated colours.
Hope that made some sense, have some trouble articulating some of these ideas from my head into writing