Hands down, Hagi for cups!!!! We more than not reach for the Hagi first to drink our tea! They feel so texturely intriguing each and every time, not to mention the aesthetic appeal of each one.
As for the brewing vessel, well that is very hard for me to choose as I seem to first go by sight, not by function. And ... there are just too many to choose from! Although, Chip does very often use the same 3 or 4 kyusu repeatedly.
Old or antique? In the antiquities field and I believe legally in the USA, antique is 100 years and older. I would consider 40-50 years to be old and the dark teapot posted is definitely old. Here are a couple of more from my collection that are old, but, not antique.
50+?
Banko Kyusu.jpg (42.07 KiB) Viewed 798 times
40+
Banko.jpg (28.58 KiB) Viewed 798 times
the 2nd teapot was verified by a retired gentleman whose career was in Bankoyaki in Yammaichi who visited me recently. He knew the potter personally who died 35 years ago.