Me four 
There are others in the house who deserve to win on what they have done in the house, achieved in the house, task completion in the house, interpersonal relationships within the house and entertainment value within the house.
That is how I chose who I wish to win. There are celebrities, in the past, who I really like but watching them in the house, I didn't want them to win. And vice-versa.
I've never really picked any house mate either celebrity or non, on what has happened before or outside of the house.