I never drank tequila nor was I interested in it. My reaction was "eww, yuck, gross". A few years ago we were unable to get into the wine tasting but there was a tequila tasting available. We thought "why not - it's a vacation" and it wasn't too expensive. I learned the difference between good and not good tequila (and that most of what my friends drank in university was very, very, very low end). I have now got an appreciation for tequila and love to drink it straight. There truly is a massive difference between low end and high end and that is true of most spirits.
Since then, we've done whiskey and cognac tastings and I'm now an avowed Irish whiskey drinker as well as brandy and cognac drinker. Something I never thought I would be because I thought I didn't like any kind of spirit straight up. You may find that what you didn't like (any spirit) was the quality. The tastings are 4-5 glasses of different grades and types so you really get to see the difference and try various brands. You can't go wrong for the price because you'd never get what you get in the tasting at a bar for that price and you'd probably never risk just picking something you didn't know. But the tastings are designed specifically for that purpose. So maybe take a step out of your comfort zone and try one that you don't think you like - you never know. And even if you decide you don't like it, they're very informative and interesting and can be a lot of fun.
In all we've done: wine (twice), beer, tequila (twice), champagne, mixology (twice), martini, chocolate & liquor, cognac, whiskey. We've never been able to fit in the rum one and also on the list now is high-end cognac and high-end whiskey (not available on all cruises). I can't say that there was one that wasn't worth the time and money. My only problem is that, afterwards I started off drinking good stuff at a moderate price levels but have continued to move up in price as I discovered better and better brands now that I know what I really like and what the difference is.