Hera Syndulla is a strong leader and skilled pilot. I struggled with her orange flight suit, but really enjoyed her overall. She's got a good colour scheme, and her skin is an interesting tone. I freehanded some concentric rings onto her lekku, which I'm pretty happy with.
C1-10P makes R2-D2 look like a model of decorum. He's a grubby astromech who is constantly grumbling, and his defining moment is when he callously pushes a rival droid out of an airlock in front of witnesses. There are Reddit threads about how many people Chopper has killed... I'm a fan, and he too was fun to paint.
Both these characters got cameos in Rogue One. I do hope I can complete the rest of the Ghost's crew.