Vaughan can be very hit or miss for me. Runaways Vol 1 was great, but he only did volume 2 because people loved the first one so much they wanted him to keep it going, even though it was clearly written with an ending. I agree with Y The Last Man, everything interesting was wrapped up pretty quickly, and the second half of the series felt more like filler than anything. Pride of Baghdad was all right but nothing special. Saga started out fine but went to shit quickly because, and this is something he stated with pride, he wanted to write stories that appealed to the artist, which meant a bunch of SJW shit got inserted in.
My favorite of his was Ex Machina, with Tony Harris. 50 issues, ten volumes, and while some points are weak it's overall a pretty solid series and I think under rated, most likely because it's a political drama. A man becomes the world's first superhero, but after a couple of years he realizes he's doing more harm than good, and instead runs for mayor as an independent. He doesn't have a hope in hell, but during his campaign, 9/11 happens and he's able to save one of the towers by diverting the second plane. The series begins with him being sworn into office and having to deal with the political world as he screws over his entire career doing what he feels is the right thing. It was interesting because it wasn't left wing or right wing. He was pro gay marriage, but also hated people being coddled and thought you should be able to smoke indoors.
I'd say his biggest problem is that he has that issue where many of his characters sound the same. Bendis does this too, which is especially noticeable in his team books like Avengers. The main dudes from Y, Ex Machina, and Saga have the same dialogue patterns and could easily be saying the same things. It's not as bad as Joss Whedon's quippy shit, but it's still annoying when you first notice it. Also, he's one of those "There should be no happy endings" douchebags. He outright says it at t
he end of Ex Machina (Just read the first three pages if you don't want to spoil the rest of the series, which I still recommend), and it explains how he ends his comics so much. Y ended with nothing getting answered and Yorrick's life turning out shit because it's the saddest thing. I knew who the traitor was going to be in Runaways just by thinking "Which character betraying the team would make for the saddest ending?" I'm pretty sure he did Pride of Baghdad just because the real story had a sad ending.
He also did another series through Image called Paper Girls. Anyone ever read that? If so, how was it?