[NiallMcCarthy]

just a thought, but

BB1 and BB8 were both okay, meh
BB2 and BB9 were both seen as better than the previous
BB3 and BB10 were both really good
BB4 and BB11 were both awful
BB5 and BB12 were both 'relaunches' of the show, even though BB12 was woeful
BB6 and BB13 were both amazing
BB7 was probably the best series, so BB14 could follow that pattern.