Wash, rinse, repeat. Every single stunt run is then a cinch.
Yeah, that's what I did in NFS: MW after learning where all the pursuit breakers were by memory, rinse and repeat. I even made videos using every one of them and one using every one plus most jumps with the cinematic cam turned on.
Unfortunately though, once you know a race game that well it becomes rinse and repeat as you say, vs spontaneous, and therefore more predictable and less thrilling.
Once you get the Carson GT Concept, everything suddenly becomes amazingly easy (including the barrel rolls) ;)
Now that I think of it, that is a stunt car and I do have it in the yard. I passed it up because it wasn't as fast as some of the others I've been using.
Seems no matter what car you use it does some things way better than others, and it gets annoying to keep driving to the junk yards to swap them.
I generally pick cars that are good at most everything but stunts, because the races, takedowns and marked man events are more of an adrenaline rush IMO.