> if your goal is to give the user a feeling which results in them clicking a signup button or going through another flow you've got laid out
And if your usability is so bad they can't find that button, the site sucks. Emotional feelings always come second to usability. Landing page usability is all about selling the user on a call to action, but they have to be able to find that call to action, that's the usability part. I didn't say anything about nav bars, I said usability. Beyond that, your users don't care to or want to be emotionally manipulated; you might want it, your business might want it, but the user don't care about that, they care that they can find the information they're looking and/or accomplish the task they came there for.
And if your usability is so bad they can't find that button, the site sucks. Emotional feelings always come second to usability. Landing page usability is all about selling the user on a call to action, but they have to be able to find that call to action, that's the usability part. I didn't say anything about nav bars, I said usability. Beyond that, your users don't care to or want to be emotionally manipulated; you might want it, your business might want it, but the user don't care about that, they care that they can find the information they're looking and/or accomplish the task they came there for.