I used to hate Marmite, for years, my wife however loves the stuff.
This was a source of minor friction until we had kids and I had to start preparing toast with the “vile paste” for them.

Then it became a source of humor as each year (on my birthday), I would earnestly try a bite during their breakfast.

After a few years, it didn’t seem so bad… then I actually started to (gasp) like the stuff.

Now I love it!