I prefer the Channel 9 nomination format by a MILE. Although the show itself is live, the nominations are pre-recorded that morning, so that the HMs won't have a two-minute nomination timer.
Also BB is quite rude, seriously just shut up and let the housemates nominate:
"(name of housemate), don't put your feet on the chair"., "You are running out of time", "Get to the point!"
Especially when he said, nominate for yourself, not for the group, BBAUS is definitely a more strategic game than BBUK. In BB10, BB let Tim off for nominating Jasmin because of her shade of lipstick and it getting everywhere...
Also being restricted to 2 points, 1 point, C9 allowed you to use the 5 points anyway you want.
Thought Thomas, TJ and Kate would be nominated...