The bit there on Deal was kind of silly. But I followed one of the YouTube links and tried watching Apocalypse. It was just another bad "reality" show. The video crashed at 10 minutes and I did not bother to restart it. I saw nothing "mentalist", "magician", in it... just another boring reality show.
The only other thing of his I've seen was Svengali and it was pretty dull too. So maybe he is not for me?
The Deal or No Deal thing is just a joke, of course. Apocalypse isn't meant to be magic or mentalism, but I wouldn't ever put it on the same level as "reality" TV.
If Apocalypse and Svengali are the only things you've ever seen of Derren Brown then you are doing yourself a disservice. Check out his earlier stuff.