You may think this topic has been done to death, yet hopefully I'll add a new lick of paint to it.
Now perhaps I'm just a neurotic who's obsessed with detail, but every inversion on every ride is different. Be it the height, the speed, the shaping, the scenery, roughness, or approach and exit, they all have their unique feel.
Therefore, out of all of the rides that we've been on, there must be a favourite particular element which one likes the most, indigenous to just one ride. In effect, this is the best of the best - your favourite precise moment on any ride.
Personally, my favourites are the Zero-G Roll at the beginning of The Incredible Hulk and, (rather surprisingly,) the Double Corkscrew at the end of Goudurix.
It may be interesting to do an equivalent spin-off that asks for one's 'favourite camel back ever' so that it brings wooden roller coasters into play.