I really believe Aaron is acting most of the time. I can tell so much of his behaviour is for the cameras. At times he's pretending to be stupid, and that always irks me. (ie. "What does hypothetically mean?") and pretending that he can't pronounce unnatural.
He is one of the more entertaining housemates, but he is annoying. I also felt that the only reason he kicked off at Joel during the meditation is because he saw it as an opportunity for some screen time, not because he was genuinely that bothered by it. It seems he's trying to create some sort of love/hate storyline between himself and Joel.
Adjoa also reminds me of Makosi, I thought that since launch night. I think it's how she seems to be in her own little world. Jade is actually really grown on me in the last few days, I find her quite hilarious. "Obviously, I'm very physically beautiful" and the crying about being abused because of ouija boards.