In seasons 2001-2008, each housemate was given 3 points to nominate two other housemates with.
The format was fixed, where the 3 points could obviously only be split into a 2 and 1 combination.
From 2012 onwards, each housemate was given 5 points to nominate two other housemates with.
There was greater flexibility, where points could be split into a 3 and 2 or 4 and 1 combination.
Which format do you prefer and why?