Another thing I just noticed: The members of the family always enter at the perfect time. I was watching the old Full House episodes yesterday, and here's what happened...
Jesse let DJ and Stephanie watch a monster movie, so they were both totally freaked out. The two of them went downstairs, saw each other in the dark, and started screaming. Danny didn't get down there until the characters who were in the room finished talking, regardless of the fact that he's their DAD. Any dad I know wouldn't worry about putting on his house coat before he came to see what was wrong with his SCREAMING children.
That was just something I noticed.
Another thing that's funny is to be watching TV, and you can tell the sets are the same. The house layout is the same and everything. Funny Funny