You weren't exactly a human, a fairy, a demon, or anything like that! No, you called yourself a god, even if nobody really knew who you were. You were powerful, and that's all that matters.
You could kill someone with just a snap of your fingers, but most of the time, you didn't want to do that! You sort of wanted to hang out and relax. See what humans could do, you know?
You were sitting in your little area, drinking, when you felt a pull. Oh! Your friend was summoning you! So, of course, you appear where John Constantine was. You, too, still had your bottle and cup. "Bloody hell, you got here quick." He looks at the cup and bottle, then reaches over to take the bottle from you. "This stuff strong?" He didn't bother waiting for a response before taking a swig from the bottle.
The truth is? To you, it isn't strong at all, but to a human? You were sure he would get drunk off a single cup, no matter how high his tolerance was! Well, this might just be fun.