[Jason.]

I didn't watch BB12 fully. But from the bits I saw, I detested. It's the only series you can judge based on how the house looked like.
Bad housemates. No mix of different ages, all 18-30. Fame-hungry looking. Cheap, trashy, tacky, and glitzy. VILE!
It shouldn't be referred to as BB, more like The Only Way Is Elstree.

As odious as Gina was, she was a great housemate. Don't like her as a person though.
I agree that BB14 gets praise, whilst BB15 doesn't. BB14 is nowhere near flawless, but there was something about it that made it better than BB15.
Yes, both had outside contact = BAD!
But BB15 had bad tasks, bad housemates, and a really negative and messed up feel and format to it, that BB14 didn't have, which makes BB14 superior.

I can't remember BB13 well, I loved it, and still do. But, did it have outside contact?
I loved the fact that the housemates manufactured the drama, without the producers meddling and manipulation, and twists. BB15 didn't have that, which is why it was bad. BB15 was a twist within a twist, each week, every week.

Best

BB14
BB13
BB15


BB12

Worst