People also have
personal taste that builds up over their whole life, and is most often not only based on fairness. Understanding a certain type of soap needs more than a single try. You can't expect from someone who has grown up with syndet bars, to be an instant convert to castile soaps and their boring temperament with slippery feel, reluctant lather, and chalky-dry skin afterwards. For sure there are people who really dislike this (or their skin just doesn't tolerate it). There are other people who, after trying it, have decided that it is not worth the fuss. But many just have never given it the fair chance it deserves, and their judgment is premature.
In this sense, your idea for Christmas presents is not only a lovely gesture, but also has a “sociological experiment” component to it.
I know all the “Scent Sells” chants too well, but IMHO
any soap is worth being unscented (i. e. I'm not objective on this topic). You are not selling. You don't have to convince people with the smell of jelly bean rainbows. They can't defend against being given it
.
And technically, castile soap hasn't a particularly good reputation of keeping scents very well. But just in case:
Longest lasting EOs