Looking awesome so far! Also, if you want more tutorials, pol*ykarbon.com (remove *) is a great resource for budding arists

. Really, though, you've got a lot of the basics down --from here it's just inordinate amounts of effort and dedication

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More specifically, you do seem good on proportions (I tend to ignore this out of my own personal tastes.) All of them have a degree of consistancy that is integral, definitely a necessary aspect of really stunning artwork. Also, you've getting there with the basic nature of poses, which is also extremely important. The pose really defines what kind of character you've got, and so it's good that you're already practicing different "personalities". I've been very lazy about poses, especially recently, since a lot of my work has been defining character appearances and less into "scene" work. You know, I should really get back to... well, anyway

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I recommend not starting to ink until you're more comfortable with a pencil. This is nothing against inking, or saying you couldn't do a fine job, but practice tends to yield increased comfort with long, smooth lines --absolutely essential to good inking. When you do ink, make sure it's not ballpoint pen! There's no point to inking with ballpoint

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I do think feet are really important, though, because they really define your character's relationship to the background (usually, anyway!) As such, I recommend you just draw feet-shapes sometime for practice. Either way, great start!