10 contestants go in, just the 10.
Emotional bonds form sooner, and as a result, deeper, more hurtful, attacks on each other will follow.
So, by just keeping it to 10 NORMAL housemates, relationships will be there, arguments will be there, it will have everything.
If someone breaks a rule 3 times, they get kicked out, and may poss be replaced if before the halfway point.
Make tasks last for only 1 day, so that the housemates HAVE TO entertain themselves.. this will ensure trouble
Just my opinion.
How would you like to see bb11 go?