Which anime changed your mind after a few episodes?

**Which anime changed your mind after a few episodes?** Have you ever started an anime expecting to drop it, only for something to click later? What changed your opinion? The characters, the story, the humour, or something else? How many episodes did it take? The reverse counts too: was there a strong opening that the rest of the series didn’t live up to? Please keep explanations spoiler-free, or clearly mark spoilers.

Steins;Gate. The first few episodes felt a bit slow and confusing. However, when the main story picked up, it started getting interesting.