Really good work. You have strong compositional skills. I love your seasonal house portraits so much I can't seem to pick a favorite. They remind me of Peter Poskas' work whose book is well worth the read. 

 On the subject of learning... I think learning new things is what keeps me interested in art. I speculate that maybe daVinci only did a dozen or so paintings because it became boring to him so he took his creative genius into other realms.

Happy painting! 

Hey, a fellow engineer turned artist - I really enjoyed your work, thanks for sharing.

"Unfortunately, I feel that I am learning things now that I should have learned a long time ago."

LOL. I've been painting forever and I still feel that I'm just now learning things I should have know all along.