Good. Smoking shouldn’t be appealing. It’s far too harmful and smelly for that. Whereas I sit next to a colleague who has changed to e-cigs and while I wouldn’t say he smells pleasant I would say he smells of nothing at all. Hurrah!
You’re not the only one. I really don’t like them either. It’s not so much the easy reply capability they offer with Facebook – I’m a GNOME 3 user on my laptop and I absolutely love the integrated reply in its chat notifications – but that chat heads pop up over the content I’m trying to look at and get in the way. Android’s native notifications are nicely unobtrusive, and my phone’s screen simply isn’t big enough for anything else, especially because they hang around rather than going away in a couple of seconds.
Personally I’d be astonished if Google ever adopt this as a core Android feature, although if they do I can imagine a core API for inline fast notification replies that goes rather beyond the current ability to attach buttons to them.