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.
Funny Moments: Believe it or not, this show has its share. Chances are if Paul DiMeo is on the build team, there's going to be some of these, such as the time he turned a Dr. Seuss book into Green Eggs and Large Ham.
Every episode featuring the Muppets is stuffed with these, especially the instance of Miss Piggy knocking over an entire house with one well-placed karate chop.
Harsher in Hindsight: Studies have shown that a large number of contestants are eventually forced to sell their newly remodeled houses, since the changes increase the house's utility use and property tax rates, but the homeowners still only have their original meager salaries to pay for it all.
The first-season episode featuring the Woslum family, where the team had a special assistant...revealed at the end to be the family's father, who was on active duty in Iraq. They'd brought him home just to do the show.
Oftentimes when the old houses are destroyed. The Latif Family stands out; they used fireworks!
The Anderson family, who are most, if not all, visually-impaired and couldn't see the demolition. So they used everything from a jackhammer, a bulldozer, a chainsaw to a bomb squad with concussion grenades to make enough noise.
The Mattingly Family. They moved the old, small trailer-house to a monster-truck arena, and had the Monster Trucks destroy the house.
The Gomez Family. The family received, among other things, (flavored!) oxygen to cope with the eldest child's blood disorder. He also got lifetime season tickets for Real Salt Lake.
The McPhail family. Due to the oldest son's fascination with volcanoes, they basically turned the house into one.
The series finale. The place? Joplin, Missouri. The challenge? Build seven homes for seven families in a community devastated by a tornado in the seven day limit. They succeeded.
Does anyone even remember that there was an Extreme Makeover non-home edition anymore?
Especially in Britain, where that version didn't air, or at least wasn't promoted to anywhere near the same extent.
Screwed by the Network: When ABC moved the show, which was averaging around 8 to 9 million viewers on Sunday nights, to Friday nights in the middle of its 9th season, the ratings plummeted to around 5 million viewers an episode, and it was cancelled a few months later. But at least the show had a proper series finale.