Best Hellblazer/John Constantine stories?

I've been reading Alan Moore's Swamp Thing, and I've been really intrigued by Constantine and his character and was wondering where would be a good starting place/good storylines to start at?

Get the new edition trades, starting with the first one: Original Sins.
BB

Original Sins is a good place to start . Dangerous habits & Hard time are my favorite ones

Thanks for the suggestions!