I'm not sure why everyone's so disappointed with this collection. I think it ranks right up there with DANGEROUS HABITS, Ennis' first collection. The mutli-part epic Hellblazer stories are always good, but you cannot beat Garth Ennis for small, personal stories, which TAINTED LOVE has in spades.
"Down all the Days" and "Rough Trade" are from issues #68 and #69 and feature the King of the Vampires (first introduced in #50). Forget Buffy for a second, Garth's take on vampires is fantastic and truly original (as fans of PREACHER already know). The King is as great a vampiric character as any ever created.
"Tainted Love" was a short story from VERTIGO JAM #1. A great little horror story from John's past featuring a demonic adversary familiar to Constantine fans.
"Heartland" is from #70, and focuses on Kit's return to Ireland. It's a testament to Garth's writing that a story about the main character's girlfriend is every bit as good as any regular issue. I don't know about you, but I wouldn't read a comic about Spider-Man's wife.
"Finest Hour", from #71, is another all-time favorite story of mine. And again, John is barely in it (only a coincidence, it's not like I don't like him or something). John falls asleep near the grave of a fighter pilot and relives the last few moments of his life.
"Confessional" is from the one-shot HELLBLAZER SPECIAL. It features a teenage John, an insane pederast preacher, and the First of the Fallen, and leads into the story arc "Rake at the Gates of Hell" from #78-83 (never collected, unfortunately).
So yeah, John is drunk and homeless the entire time, there are no big demons or magic tricks, and no cons pulled. But these are still some damn good stories for fans of horror, drama, comedy and...well, just entertainment in general.