I havenβt really compared different knitted buttonholes before, so #yarnuary seemed like a reason to try this out. I found these two on this page from TECHKnitter: http://techknitting.blogspot.com/2012/03/horizontal-buttonholes-including-new.html
I made them different sizes, but oh well. The first one is less fiddly and less symmetrical. It also feels less durable. The Tulips buttonhole is fiddly, but it is tidier.
Tomorrow I'll look for other methods.