hahaha when you say Ging is irresponsible, I totally agree.
At first I was disappointed at how he turned out, but, if you think about it, his character has been very consistent, up to the very world tree arc when he had a one on one with Gon. He accepted that he never really wanted to be a father in the first place, and Gon just happened- and even admitted that he won't even try to make up for whatever cutesy fathery stuff he failed at with Gon.
And I guess him sticking up for that, even with a straight face telling that to his son- is not admirable. But I like how Togashi stuck with that hate-able character and didn't succumb to the pressure- I mean, Ging had been popular all along, and his buildup so goddang mysterious and awesome. Then all of a sudden he's this guy who people hates and the kind who shuns responsibility, etc. etc. If it were other writers they probably downplayed his assholeness- but here I was able to say "wow, Ging is really an asshole!" And that's what's awesome about Togashi.