I know, it's a forum and everyone has an opinion, but I think BB5 in no way overated.
It saved possibly saved Big Brother for another 4 years after BB4.
It brought a new dimention to the UK and even worldwide format. No more back to basics. Now the UK is all about enduring tasks, mesing with minds, secrets, twists and trickery. This mostly rooted from BB5. Even the house and eye now matches the series theme.
It was in my opinion one of only 4 series (Out of the 15) to have a perfect set of housemates (Being BB5,6, CBB4, and BB7) Oh look, it's my first perfect set of Housemates lol
It was fresh and new and actually fun to watch once again, and above all it exceded the shows potential far beyond anything from before or since. So, who agrees