Kevin Smith's run was actually my first and only exposure to this character, in book form. I've only read Sounds of Violence, but I absolutely loved it. The humor and the vulgarity were almost sitcom like...which really gave it some perspective, compared to most books. Where as Spider-Man is cheeseball funny....this Green Arrow book was just "haha" funny. I also felt that the violence level was able to lend to the story. When I checked the graphic out from my public library, I was worried that all of the action would involve Ollie using arrows to pin people to walls or to pin their shoes to the ground...but I was floored when I saw that quite the opposite happens throughout the entire book. The young former prostitute character is also a very nice dynamic. Is she still in the books? Did Ollie make her the new Speedy, yet? As for Grundy...
A)He's a wandering Zombie
B)Do zombies really need an excuse to appear anywhere?
I'd think not. He could show up on just about anybodies back door and you shouldn't be surprised. He's a zombie, that can tear s*** up. He's the kind of character designed to be thrown down with, whenever you feel like having a good fight scene.