The Big Brother's Little Brother presenter admitted that Sam is his favourite housemate, because too many of the other contestants have been "a bit boring".
Lamb told Heat: "I'd say Sam Pepper coming into the house was the shake-up that we needed. He's said all the things we've all been screaming at the telly for the last few months.
"But he's treading a very fine line - I can't work out whether I can't stand him or I really like him."
He added: "He was borderline pain-in-the-arse until Corin gave him a slap and he calmed down. Everyone seems to have taken him on as their annoying little brother.
"What I really like about him is his honesty - everyone else goes in trying to give off the right vibe so that they don't get nominated, but he doesn't really give a damn."
Asked if he would move to Five to front BBLB should the programme be given a reprieve by the broadcaster, Lamb said: "If that happens and they do take Little Brother then it's definitely a conversation we would have.
"It's been a big part of my life and I'm not going to slam the door shut on it all. Who knows what will happen? Who knows if they'll even want me?"