Well, I can start off with one example.
I hated Howard Shore in the 90s. Especially those droney Cronenberg efforts, but also when he nurtured a similar style outside, like SILENCE OF THE LAMBS. But then came LOTR, which was a revelation, then I discovered his lighter side (MRS. DOUBTFIRE, NOBODY’S FOOL, that kind of stuff), and over the years, I slowly began to appreciate some of those Cronenberg things as well, although my favourite of that work remains his dreamy synth score for MAPS TO THE STARS.
So now I quite like him.