Yeah, it's a personal preference thing.
One thing to remember, though, is that you need to consider the brush's loft and/or floppiness as well. Some brushes (let's say a Simpson Chubby before all the hairs fall out) and a Vulfix of the same knot diameter would perform a lot differently, and the Vulfix would splay out a lot more on your face, making it 'seem' even bigger in comparison.
Be there or be square. Only I can do both!
I've got a cat named Beefeater and a dog named Beefeater, and two goldfish called Beefeater and Beefeater. There's Beefeater my hamster and Beefeater my horse, and my piglet, known as Beefeater of course.
Veteran of the Great Irisch Moos Campaign of 2008-09