Welcome to Gaia! ::

Your pictures are full of creativity and originality smile However, I see a few minor errors in proportions and some poses look awkward and uncomfortable. Feet are difficult to do, as well as hands. The feet of your drawings seem too stubby for the height of the character. I don't have any real good system of measuring and estimating other than just going by if it looks right or not. Drawing shoes and feet facing you is challenging too, and my only real suggestion would be to look over other people's artwork and try and get a feel for the funny perspective of the feet (Like this artist for example). Not copy but just try and get a grasp of what shapes you are looking for.

Also, the clothing creases seem a little wonky in places and make wierd unnatural shapes. This too can be challenging and my only advice would be to remember gravity and which ways it will pull the shirt down and what shape of the character will hold it up. ie. breasts of a woman will make a much different shape in a fabric that a male. The woman's will hold the shirt up more and this have creases around. When a character wears tighter clothing, it also becomes the idea of where the tension is instead of just gravity. A tight shirt on a woman will cause horizontal-ish creases across the chest whereas a male it will more or less have none. The sleeves are a little more difficult to do, but concentrate on the main points of pull; elbow and under-shoulder (of course depending on the pose as well).

If you need to, you can always grab some clothes and go to a large mirror and put them on, posing yourself as needed or just generally watching the behaviour of the creases. I do it all the time ^^; It helps concentrate and visualize the effects of the real world. How many times have I randomly put my arms or something in a pose in the middle of my classes to visualize my drawing? hehe... a lot. I think people are too scared to bring it up XD