Creatively ingenious ! ;-)
I admire how you draw with ink without sketching (or do you...?)
I would be scared without a first sketch, but it would probably come with the experience...I love how we, artists, all find different tools that are like a prolongation of our hands..LoL
A bit out of topic :
I would challenge you to do your PortraitInPictures, explanations here , as it would be so interesting with all the facets of your art ! ^_^ Feel free to think of it and to come with your own version if you feel the momentum ;-)