woah! That's awsome!
I did these 2 today (not in MS paint, but still pixel art) instead of studying XD
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i used a base, but i edited the eye and skin colour of it, the text doesn't say anything, i was button bashing in a symbol font
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Don't look at the hair, i hate the hair, NOOOO you looked at it didn't you? Well, pixel hair is hard, even when using a reference pix!

heh, dispite it being time consuming, I love pixel art!
both of those were done in paint.NET (my baby)