I think Steph is pretty enough. V3 used to have more head morphs, but now that the "International" morph pack is available, Steph's almost caught up.

And I really like Steph's body. She's got a slender, willowy look, that's great for a teen character. She's not just a small V3. Her hips are narrower, and it's easy to make her flat-chested, if you want (for a young girl). V3 takes some work to give her a similar look, and she often doesn't move very well once you've morphed her that much. And then you have the problems of clothes not fitting. Steph may not have as many clothes as V3, but she's got a better wardrobe than most of the morphed V3 teen or preteen characters.