I've always wondered this, because to the majority it seems like being loud and waving your arms around makes you an entertaining housemate.
To me Ash, Ashleigh, Winston and to a degree Helen have been the most entertaining housemates this series, yet alot of people call the 1st 3 boring.

Mark was easily the most boring housemate until the final week he was there, and the only entertainment he provided in that week was being shouted at by Christopher. For the first 4 or 5 weeks though Mark was considered the entertainer by most!

mg: That fact in of itself is more entertaining than he was. As for Slobven and Kimbot, they could piss off from week 2 tbh, even before the whole Steverly facade.
Do people get tricked by fake personas and tantrums or something? All that does is takes air time from the more interesting housemates who can entertain from what comes from their brains.