Currently [as usual] Yixing.
But I have a small black, stone polished, Yun Nan Teapot on the way from Scott!
When it arrives for at least a day or two IT will become my favourite.
It is normal for me to have a couple of all time favourites
But when a new pot arrives
excitement relegates them
And seemingles trivial events, spotting a Jay in the garden,early in the morning for instance, can trigger something in the brain - - "Oh,
I have not used THAT Teapot for a while
" and another teapot will take centre stage for a while.