Using a regular mouthpiece shape has some good benefits:

• Versatility: It's perfect for beginners since it works well with many different brass instruments.
• Comfort: Most players find it fits better, making it easy to use.

On the other hand, special mouthpiece shapes can:

• Improve Performance: They are designed for certain styles or techniques, which can make your sound and tuning better.
• Better Fit: They offer more comfort for advanced players who have specific needs.

Each type has its own advantages, depending on how skilled you are and what you want to achieve!