That when I hit the brake run I desperately want to ride it again.
Of course there's other factors that could affect that (busy park/cred run so limited time), but I just want to come off and go "yes that was good".
Granted my trips have been non-existent for a few years now, but Untamed was a great example of not being the tallest or fastest coaster I've ridden but coming off it with a sense of enjoyment and eagerness to ride it over and over again. Lost Gravity had a similar response though not as strong.
Cedar Point after doing TTD was a pure adrenaline rush. However I came off a number of coasters there including Millennium Force with very little desire to re-ride them. Whether it be comparison to other coasters or just kinda falling flat.
If I went super analytical I'd wager most at the top would be B&M Inverts. But the likes of Raptor down the bottom with a top 3 of Nemesis, Katun and Oz'Iris, all very different coasters to each other but ones I could ride over and over.
Stats are meaningless if the actual ride is dull and doesn't have any wow factor. Which is why I'm dubious over Exodus.