I love the Vater 8a. This model’s diameter, length, taper, and tip make controlling the stick incredibly easy for me. But this is a personal feeling, and can be different from person to person.
What is not subjective is the quality of the Vater sticks. Those are perfectly matched, straight and the fact that Vater uses woods with higher moisture content makes them more durable. They also have the right amount of lacquer, and they just feel amazing in my hands. I also love the fact that they make the same model in Sugar Maple which is perfect for when I need to play softer.
I really recommend exploring the Vater immense catalogue.