I'm not gonna bother posting clips, because C4 are dickheads and have probably blocked 75% of them. But a few of my favourite moments have been:
BB9:
When Davina announced to the house that Rebecca had been evicted over Darnell and Mo.
Spit Gate.
All the late night chats between Darnell and Dale at the start of the series.
Mario dunking his custard cream.
Jen being evicted over Rex.
Rex, Dale and Stu eating all the remaining food one night and getting caught by Kat.
Mo and Dale arguing over the toothbrush. "Why are you winking at me"
CBB6:
Coolio winding Lucy, Tina and Ulrika up. "I don't give a ****!"
Coolio getting Ben. "I saw you looking at her arse".
Terry and Coolio's late night chats.
Coolio vs Tina throughout the series.
Verne getting drunk, flirting with all the women then driving into the diary room door.
Other series':
Ziggy to Chanelle: "It's not you it's me". [BB8]
Ziggy doing that singing task. [BB8]
All of Sree's great quotes. [BB10]
Marcus vs Lisa in the bedroom that time. [BB10]
All of them breaking down the fire escape and running round the camera runs in BB10.
Vinne winding Alex up all the time. [CBB7]
Stephen in the diary room, can't remember what it was he said but he just started randomly rhyming words together. [CBB7]