Thanks so much to everyone for the sweet comments on Sophie, the little half-rat, half-old-man Yorkie! :-) I decided to keep her a little shorter because she's a really active dog and loves rough-housing with other dogs and exploring outside. After exploring the videos and photos, I got out the safety scissors (afraid I'd poke her eye out!) and had a go at it... Here are the results. Not outstanding, but entirely passable. The other dogs won't laugh at her when we pass them on walks, lol. I trimmed round her face, got rid of the "feathers" on her legs, and shortened her torso on the bottom length only so it looks less scraggly. I'm calling it the Bowl Cut.
Hopefully her hair will thicken up a bit as she gets older and we can try out some of the gorgeous haircuts your furbabies have!