We like #26 - it's got a bit of a Rocky Horror vibe, and that suits this campaign. The only problem is not it does not invoke the idea of quitting smoking. We wonder if there's a way to incorporate a cigarette with the mouth to get that point across? We'd also like to see the text treatment done up a bit with some Web 2.0 style gradients - subtle, nothing too over the top.
#27 is okay, but is less readable - the text seems to blend together, and the orange in quit doesn't look as good against all that pink.
The other three aren't quite what we're looking for.
Thanks for your efforts - they are much appreciated!