Todayβs buttonholes I tried out for #yarnuary look pretty similar.
The bottom one is an afterthought buttonhole: https://blog.loveknitting.com/elizabeth-zimmermans-afterthought-buttonhole/
The top one is a waste yarn buttonhole. https://fionawinning.blogspot.com/2007/10/nameless-buttonhole.html
I like the waste yarn one better than anything else so far, but the afterthought one could certainly be handy.