I've shied away from pocket squares for a number of reasons; not least their level of formality / dandyism is not suitable for my business casual work environment (I wear a suit most of the week, with SC and mid-grey trousers on Fridays / when I'm too tired to fuss with a tie), and I'm still putting the finishing touches to my basic wardrobe (alterations tailor). The use of a PS immediately draws attention; thus, until such time that I have confidence with my fits, combinations and a sufficient wardrobe to incorporate a PS, it's best not to wear one rather than introduce a complex element when still getting the basics down to pat - especially an element that requires confidence, assurance and spontaneity. Given my work situation, a PS will be best introduced on those rarified occasions when I feel it is appropriate to wear a tie with a SC. Then the PS will most likely resemble @claghorn's Japanese art print, as I have an interest and some (or did have) knowledge of Japanese art. Of course, I need sufficient number of functional SC's, then focus on appropriate ties for odd jackets with tan chinos / mid-grey trousers or flannel, before I even consider what type of PS fold to choose.