Was the first one to spring to my mind. Also the Rob Brydon ones for cruises because I just don't get the point - why not just get any old person to do it if he's not going to even be funny? And all the gambling ones that try to make internet casinos look like mystic palaces of sophistication and daring.
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Agree about the gambling ones, but there is a certain pleasing symmetry to commercial breaks don't you think? First you get the gambling ones, then you get the payday loan ones (so you can borrow back the money you lost gambling), and then finally there's the "How will you pay for your funeral?" ones; just to remind you that you can't just use a payday loan to cover essential household expenditure, you've got to cover all the debts your loved ones will have to deal with when you kark it.