I like zip / accordion style bc IMO it's the best / most efficient use of space
Presently living in a LV Vernis Zippy, plan to use her until she dies!
My former wallet was a Tory Burch continental flap but would get overstuffed quickly. Also the particular one I had fit US dollars well but the was a touch too short for Euros. Kept getting currency caught in the zipper, yarrr...