This is an interesting area because there's a lot of room for debate about what a good "vibe" is. Is being really positive all the time the right vibe? In many/most office environments, it is considered to be the right vibe. In a small startup where you're trying to validate PMF, it's not necessarily the best vibe IMO.
"Vibe" isn't so easy defined as being positive; more like the way you interact feels "natural" and doesn't lead to negative emotions.
In a startup, lots of mistakes will be made. A team with the right vibe knows and acknowledges this, but focuses on fixing the problems rather than finger pointing.
In that sense, "vibe" is not inherent to the individual, but I like to think of it as "we're on the same wavelength" when it comes to key things. So it really means "does this person fit with this team and this mission?" -- "vibes" sums that up for me.
