I don't think I do have a single 'go to' tea. I do have several that I reach for when I need comfortable tea without a lot of fuss, including several shu puerhs (e.g., Norbu's Lao Cha Tou brick, Menghai golden needle white lotus, and the 'mystery' puerh from the back of Dad's cupboard); a couple of oolongs (fancy spring TGY from several sources, SeaDyke red label TKY); and the Korean Hwang Cha from Hankook, a no-fail tea.
Today, I had to brew up a thermos several hours in advance of a long meeting, so it was the 'mystery' puerh, brewed up in the giant dragon Yixing that was also an inheritance from Dad. I tried to pay attention to the dragon's tongue, after some discussions in another topic here, and while it did pop forward as the pot emptied during the pour, it didn't have any particular sound effect associated with it: is it supposed to?
(one more edit: we only have one option in the vote above)