Yesterday I had a lovely thermos session--leaves dropped into thermos, flash rinsed, then thermos filled and tea enjoyed over the course of an afternoon--with Norbu's 2007 Yong De white bud sheng. It had a smoky earthiness when young that was quite enjoyable to me at the time, then that faded and a more delicate floral and spicy taste would be equally lovely in a very different way.
I bought this tea in 2009 and more in 2010, but soon after that, in my dry LA storage, it went through a long phase of being quite unexciting--not bad, but the fading of that smokiness and earthiness left a blandness behind.
A few years later, however, this session was lovely. That baseline floral and spicy quality is back on top, with a delicacy that is quite fine. I need to prepare some gongfu sessions and explore it further again.