I agree, it looks fine on you. How long you wear your kilt, depends upon the purpose for the kilt. If you're wearing it for hiking, it shouldn't be touching the back of your knee, otherwise, middle to top of the knee is fine. Many "new age" kilt wearers, actually wear them too long. I think the Queen wears Her kilt so that when She's kneeling with Her back straight, the bottom hem just touches the floor, but that's not usually in a physically active situation.