Having previously featured Jim Mahfood's so many great sketches and commissions done at conventions that he shares on Twitter, I notice a lot of memorable indie stuff like Tank Girl or GRRL SCOUTS.   However I do love it when he has a take on more mainstream characters from DC and Marvel comics, here are some of those:

Mirka Andolfo Art Tweets Collected

Alex Maleev Art Tweets Collected

Alex Ross Tweets Collected - Museum Quality Art in 280 Characters or Less

BONUS RANDOMS