The only winners I actually liked were,
BB2 - Brian Dowling, who won I think for being a geniunely nice man, who had a great laugh.
BB3 - Kate Lawlor who was a normal girl, compared to some of the housemates anyway.
BB5 _ Nadia, who had me in stitches from the beginning of the series until the end
and thats it!
I think a good housemate should be funny, not take themselves too seriously, join in the tasks and not assume they are the winner from day one!