Ricks portrait

Another portrait from Earthsworld reference image. 
I drew this one a couple months ago and wanted to take another look at it after some time has gone by. I like it more now than when I did it.

hoping to figure out what’s keeping my likenesses off. I’d like to find the measurements that are consistently one way or the other. Like, I tend to draw noses too small and heads in general stretch out top bottom.

thanks! Stay healthy!