Reaction: (dictionary definition)
A response to a stimulus
The state resulting from such a response
Ergo, to provoke a reaction, you have to stimulate. It's a very common misconception that everyone is wowed by magic.
Getting a reaction ISN'T DIFFICULT. But STIMULATING a reaction IS difficult.
In fact, you could make a full grown elephant appear from a thimble, and there's a handful of people out there who would just say 'so what?'.
Magic is an artform. And as with most artforms have performers, creators, students, teachers, and appreciatives.
Finding your appreciative audience, and adjusting to their needs is part of the art. Which is the main reason (thank goodness) that although magic is now widely available (thanks, Mr Berners-Lee), it doesn't mean that we have a slew of quality magicians!
Performing magic isn't about 'getting it right' and 'making it perfect'.
If that were the case, why didn't Van Gogh just PHOTOGRAPH the Sunflowers? That way, it would have been a perfect picture.
What Van Gogh, and any other artiste does is to inject some character, some creativity, some individuality.
Riding high on your list of priorities should be learning a performance inside out in terms of technicality... basically so you can do it with your eyes closed, in your sleep, with your hands tied.
THEN...
Work on your own PRESENTATION of that performance.
Add nuances, things which fit your character. Make it yours.
This is the BIG DIFFERENCE between getting a yawn, and getting a reaction.
Also important is setting the scene, and choosing your spectators wisely. You can't just jump on someone and expect them to be wowed. That's far too random.
Spectator selection can be paramount to the reaction.
Drilling friends brains to mush by repeatedly torturing them with new effects is a no-no.