Which series had the best finale—and which one ruined everything?

Hi everyone, I recently found myself discussing TV series finales again and realized how much an ending can change your entire memory of a series. For me, Breaking Bad really nailed it: consistent, suspenseful, and without artificially smoothing everything over. With How I Met Your Mother, on the other hand, the finale felt more like years of character development had been torn apart again in the last few minutes.

I’d be interested to know: Which series finale was truly perfect for you—and which show’s finale ruined a lot in hindsight? Please don’t just name titles; briefly explain: Was it the resolution, the pacing, an ill-fitting twist, or simply the wrong expectations?