These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Tear Jerker - Boone's death at the end of the first season
Todd's death in the next to last ep.
Special Effects Failure / Visual Effects of Awesome: Some of the effects have aged very well, others not so much. Amusingly, the mothership in Season 1 was awful even for the time, while it's updated look from Season 2 onwards is probably the show's best effect and holds up well today.