Greg brought up an interesting point regarding Ed Brubaker and Sean Phillips' excellent crime drama, Criminal - basically, which format do you prefer for Criminal?
The stories are good in the monthly format, but they probably do read a bit better in the trade collection. However, as Jay Faerber pointed out, the monthlies have extra goodies in the back in the form of essays about crime fiction (movies, books, ec.) (and they have great pin-ups accompanying the essays).
So what format do you prefer when it comes to reading Criminal, which is one of Marvel's best titles, so if you're NOT reading it, well, you should (good comics should be read).