We went once at Laguna Seca (2011, I think) and it was incredibly hot and miserable. I went to the first year at COTA. Pretty amazing - it feels like that track stretches into another time zone.
I stubbled across the superbike tour at Kyalami in South Africa back in ‘87. Blew me away. So cool. Doug Polen & Wayne Rainey battled it out. I can’t remember who won but I’d damn sure go see bikes race again. The speed was unreal.