Favourite quiz or game show

Over the years there have been some great quiz and game shows.  It would be interesting to try and work out the most popular all time show.

For me, two contenders fit the bill.  The Chase, hosted by the brilliant Bradley Welsh gets my number one slot.   There have been some really funny moments where he has had difficulty in keeping himself from laughing. 

My second choice, is a programme that when I first saw it, I thought it would be a flop, but I grew to like it - Deal or No Deal.

What are your favourites?

David