I would say it would be more likely that you genuinely like this band. If I was being logical I would say that taste isnt something that can be so easily acquired such as in your predicament. It would be impossible for you to hate them then just "get" them just because someone else you wish to emulate does. It has helped that finding out she likes them has made you more open to their music.
If I was to completely ignore logic(as do 99% of the people who use the internet) and delve into my own experiences where I would belittle and berate the musical choices of people I liked(who more often than not had TERRIBLE tastes in music, or what I would deem to be terrible tastes in music) regardless, it would still require me to acquire my own tastes in music.
So I would think that you do genuinely like the band but just in case you want to be sure check out similar bands and see if you like them as well.
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