I pay more attention to oil temp and trans temp for consistency.

But water temp I like it HOT, because after 5-6 rds (hope) I know I wont have the time to get it as cool as I would like, so for consistency sake I make all my laps a bit hotter than most would.

Crossed the line in the finals once at 240....... I had to wait so long at the end of the track too cool down, the camera guy left, no winner circle pics. Was racing by myself and was very very fast, never had time to get any water on the radiator later in rounds, that car always got hot though.