Roughly 23-25 years ago I was a 12-14 year old metalhead with a very negative and limited view on any and all electronic music. (and I pretty much referred to all electronic music as techno, which tells us a lot about my limited knowledge at that time)
My brother (bless his memory) was a bit of a scatterbrain and he would leave his cd's in the weirdest locations. One day I found some weird featureless caseless cd on the floor in one of my family's cars (with no cd player). It might have had a record label logo on it and perhaps something mentioning "halo". I instantly thought it was my brother's and given the fact I discovered many of my then favorite metal/rock bands through him (and his random cd's left in random locations) I decided to give it a listen.
I went back home and popped the cd in and it changed my outlook on music forever. It opened my ears.
"I didn't know electronic music could sound like this?"
https://www.youtube.com/watch?v=Nmpa9GfZtHA