I don't like:
1. funny looks and comments when I'm outside one of those "less reputable" places. Usually though, it's some old drunk at a hole-in-wall-bar giving me the ol' squinty-eye until he finally realizes and says, "Oh hey, that's one of those
Eeee-lectric cigarettes, huh?"
2. ritualistic filling/charging cycles. Self explanatory.
3. not being able to get replacement ANYTHING at the local gas station/convenience store at a reasonable price. Which sucks since my secondary goal of quitting was to save money (so far, so good as long as I can keep stocked up with buying online

)
4. dehydration. I drink a LOT of fluids. I did before anyway, but it's more so now. I'm probably on par with what I was drinking when I was living in AZ... and probably STILL not getting enough.
Also: it may be related to dehydration or some other unrelated factors... but shortly after I quit smoking/started vaping, I noticed my skin and gums seem more sensitive now. Not sensitive as in feeling; but rather, it doesn't seem to take as much effort to break the skin or make my gums bleed a bit when I brush/floss.
And just to provide a quick counter to all the negative this thread portends, I'd like to mention that I haven't gotten sick once in the year and a half since I quit; I've had very few runny noses (even during pollen season!), and coughed up less phlegm in that whole time than I did in any given week back when I was smoking.