I think the best motivation for Etsy sellers is when they get 100% positive feedback from buyers. I am proud and happy for the fact, that I have been given only positive feedback by my customers so far. That's what gives me energy and motivation to create new products. It makes me go for new ideas, for new challenges, ..
What also make me happy and keeps me motivated as a seller is when my products are featured on blogs or Etsy treasuries. I was kindly surprised when I "googled" my shop and found this! :