I hadn't seen the gladiator before but hate his arrogance. I love the way that the rest of his team think that his Alpha Male shtick is ridiculous and just laugh at him.
The ex boy band guy and the Eastenders guy both come across well - team players, quiet when they have nothing to say, stepping up and competently taking control when they have genuine knowledge and experience (recording the jingle for the former and filming the advert for the latter).
AJ is rude and arrogant. Ex Apprentice is a dickhead.
The rest seem ok.