I prefer vape to e-ANYTHING... I really don't like the e-XXX terminology. It sounds like a knockoff of i-Xxx which I also dislike.
Sort of grooving on the 'cloud' thing, but that is also used by the 'blunt' crowd.
There is a slang evolving, and it will continue to. New words can't really be forced, or agreed upon.. like all language, it will evolve. People will use terms that other people like, and they will just spread and stick. The fact that we are using ecig, vape and so forth are proof that they are the 'agreed' upon vernacular.
So, I'm gonna suck on my personal electronic nicotine inhalant system, or, P.E.N.I.S. for short.