Which ones aren't? I mean some are not bad or even quite good I guess when I read them but almost all stories are washed out and going nowhere ever. Very safe writing with stereotypical characters acting in their comfort zone. Look at John Constantine and friends for example, perfect example how they took cool engaging characters with deph and made them boring one trick poneys.
Even more important though, it is just all a marketing ploy to make us buy more comics. I mean each other issue has some tie in to another book and to get the whole story you have to read up on that, really annoying. Crossovers and events are cool, once in a while.
Good series: Snyders Batman, Morrisons Action Comics, and that's about it.