Does the straightness of the brush have a great influence on calligraphy?

The normal brush is straight, and the pen holder that is not straight can be used if you are used to it. It varies from person to person. If a calligrapher has been using a straight brush, he will not be used to it, but it will have a greater impact!

Of course, it is recommended to use a straight pen because it will be more flexible to use. . This is my personal opinion.