Which is better, board painting or hand painting?

It varies from person to person, so long as you work hard, no matter which one can be drawn well.

Personally, I like hand drawing, but sketch can be directly applied to software without a scanner or anything. It is not as easy to fold, rub and drop lead as hand painting. However, I still like to draw my own efforts by hand in kind, rather than some data. Hehe, I remembered the teacher's words, and my memory is not as good as a rotten pen. It's still very reassuring to see your achievements.

For reference only, if you like sketching very much, go and learn it.