Same here. I started active music listening in late 80's when I was in high-school. My taste in music differs significantly from the masses and most music I heard passively did nothing for me or sounded bad to my ears. I simply didn't know there's TONS of more marginal/obscure/weird/cool music out there to explore. That changed in 1988 when I heard acid house music played on radio.
My first favourite "band" ("act" rather) was
S-Express. I also liked
The Beatmasters a lot. In 1991 I heard
The Prodigy's
Charly on radio and became a fan. In 1992 (or was it 1993?) I discovered
Jonny L. In 1993 I bought
Autechre's
Incunabula because the cover art looked so cool and it was released by Warp label. I was blown away. Up to mid 90s my music taste was limited mainly around electronic dance music and IDM. However the fact that electronic dance music had peaked in 1992 and became less interesting (rich/innovative anything goes pioneer attitude was replaced by puristic subgenres and also electronic dance music became more commercial) as the decade progressed, I started to slowly become interested of other kind of music too.
In 1996 I got into classical music. In December 1996 I found my favourite composer,
Sir Edward Elgar. In summer 1997 I got into
J.S. Bach. There are dozens and dozens of other composers I like too, but these two are above the rest for me.
In 2001 I moved to a building with cable (instead of antenna) and for the first time in my life I was able to watch (Nordic) MTV. To my surprised I actually liked some of the pop/rock music they played. I was becoming more tolerant and less prejudiced of different music styles. Of the many acts/artists of this period of discovery,
Mull Historical Society aka
Colin MacIntyre is perhaps my favorite, but there are other good ones too.
In 2002 I got a "digibox" that allowed me to watch digital TV broadcasts. It as possible to subscribe to a service that contained 30 digital radio channels each playing a fixed music genre. One of those was
new age, a music genre I had never heard of before. I really liked that calming moody music (especially as background music while doing something like browsing online/writing messages online). I'd say my favourite new age artists include
Raphael,
Suspended Memories and
Robert Rich.
In 2008 I made two MASSIVE discoveries,
Tangerine Dream and
King Crimson. I had known and even heard Tangerine Dream since early 90s, but I wasn't ready for the music and I didn't understand how massive they actually are (In Finland Tangerine Dream was been almost unknown). In 2008-2010 I bought no less than 90 CDs of music by Tangerine Dream and I just pre-ordered their new release Coventry Cathedral 22. As for King Crimson, I had never heard of them and when I heard their music on radio I was blown away how great rock music can be. I have never been much into rock music. Almost all of it just sounds stupid to my ears, but King Crimson is stunning rock music!
In 2011 I discovered
Carly Simon. I knew her, of course, but I never thought I'd like her music much. I explored her music in 2011, because I have always liked her voice a lot, but I thought her music is uninteresting ("You're so Vain" is imho far from her best songs, even boring to her standards!). After listening to her music on Spotify about 3 hours, my years had adjusted to her music style and I was blown about the quality of it. No weak/dull songs at all! Different music styles are combined so skillfully to great astonishingly flowing and captivating music with great lyrics (lyrics don't matter much for me, but good lyrics are a plus anyway). I think Carly Simon is one of the most talented and gifted musicians/singer/songwriters of her generation. I hate Christmas albums of pop artists, but I have Carly Simon's "
Christmas Is Almost Here", because that one is actually good!
Around 2012 I "returned" to MTV pop and to my surprise I found myself loving a lot of what I heard. Retrospectively I have understood that the pop music of 2010-2013 is a lot to my liking. That's when american pop producers used tons of influencies of European dance music creating a "YOLO" dancepop style that I find insanely cool and fun. There seems to be some kind of consensus online that the year 2011 was especially strong in pop music.
Katy Perry blew me away and in 2013 I discovered
Ke$ha/Kesha. While Katy Perry has become progressively worse (and with "143" almost unlistenable) since
Teenage Dream, Kesha has stayed interesting, creative and impactful. I have preordered her "." album. I think Kesha is a genius of pop music.
In 2016 I discovered
Jean-Michel Jarre properly. I did have a complilation CD "Images" of his music since early 90s, but somehow that CD gives a very lame picture of Jarre's music. Only when I listened to his albums on Spotify did I feel the greatness of his music. I was actually a semi-fan briefly in the late 80's, but the "Images" CD killed my interest. How do you compile that bad compilation CD of his music is beyond me...

Around this time I was also a lot into 70s funk. I got into
Rose Royce and
Herbie Hancock. I have never been much into jazz despite my dad being a jazz nut, but I discovered the funk jazz album "
On the Corner" by
Miles Davis. Great stuff!
In 2021 I discoved
Air Supply. Never would I have thought I'd enjoy ultra-syrupy yacht rock, but I do like this music. Russell Hitchcock has a great singing voice and Graham Russell knows how to composer for his voice. The music is
proudly syrupy and if I am in the mood of syrupy music, Air Supply delivers! In fact only the albums of the early 80s are ultra-syrupy and later albums are more epic stadion rock type of music. Ironically this band has been popular in places as far from Finland as possible: Japan, Australia, South-Africa and America.
In 2023 I got into early 70s sunshine pop, artists such as
Mama Cass Elliot and
The Carpenters, but
Maureen McGovern's first two albums blew my mind the most, especially her first album "
The Morning After." Sadly there are no proper CD-releases of those albums available. The best we have is crappy vinyl rips released on a weird Swiss label (MMMA #4194), but the music is heavenly! I also got into Vaporwave music. Italian artist
B o d y l i n e is my favourite
I have also tried to find great 80s synth-pop, but it is not easy. Most of that music is actually pretty bad. Jennifer Rush is fine. At least she has got a great singing voice... ...that said, a lot of my music discoveries have been surprising to myself, music that I never believed I would like. God only knows what kind of music I am going to discover and be blown away in the future...