A drawing that started as a sketch and ended up being one I took my time working on on-and-off for months was this one of actress Jaimie Alexander. I loved her in the first two Thor films but really became a fan when she started starring in her show Blindspot (which is still on the air).
Etsy link for the original (prints available upon request):
https://www.etsy.com/listing/665284419/original-sketch-of-jaimie-alexander-not