Yeah but the "leave me alone" types means lack of dialogue and interactions with others and that's why Shadow isn't my favourate because when he's not ignoring you he's just saying "Hmpth".
Because Matt Ryan made Constantine a bit more friendly means he can pass off as a snarky git at times which may irritate his friends and foes around him. That banter alone can be used for context in the story or fleshing out characters.
That's just how it is in the comic.
Constantine had too many death friends so he kinda always want to act alone.
It was changed though during New 52 reboot with Justice League Dark.
Attitude-wise, Keanu version is closer pre-New 52 Hellblazer's Constantine but Matt Ryan version is closer to Justice League Dark's Constantine.