When crocheting, there are 2 grips for holding the hook: like a knife or like a pen. The choice is - of course - a matter of what you've been taught and what you prefer, but can anything in general be said about the (dis)advantages of both grips?
For instance,

• is any grip better for your finger joints and wrist,
• does it help to crochet faster,
• is it easier when crocheting larger (heavier) projects,
• does it allow you to switch yarns more easily or anything else that occasionally needs to be done during crocheting, etc.

Also, if there is another way to hold the hook, please don't hesitate to mention it.