Just did a rewatch with daughter. She wanted to watch after seeing the musical episode. Still stands up in my opinion even though we know Joss and some of the cast weren't perfect.

The Season 6 rapey tech bros were still a very hard watch and skipped an episode or two in that season but hard not to see it as a bit prescient - it was before Gamergate and the right wing radicalisation of young men online. Should have paid more attention. It went a bit over my head first time.

Working through Angel now. Will see how that holds up. Has been a long time between watches. I kind of started House again though so ...

Wife can watch unlimited Supernatural and I think she might hold a record for rewatches of Voyager.

Ensemble comedies like UK Ghosts and Community seem popular for rewatching with family. I think that is probably a general theme along with animations. Less serious shows tend to do better I think. Psych and Monk are probably more likely to get a rewatch than a serious procedural.