Is there a book or a book series you didn't think you would like but ended up loving it?

For me it's Dungeon Crawler Carl series. I've never read a LITRPG before I thought this is the most absurd shit ever, but it's so well written and the funniest books I've ever read with some seriousness. I don't normally do audible books, but this is a series that it's best on audible the voice actor is phenomenal. Any ways, my son got me into it and I am heading into Book 5 in the series.

The premise: A man. His ex-girlfriend's cat. A sadistic game show unlike anything in the universe: a dungeon crawl where survival depends on killing your prey in the most entertaining way possible