a.k.a. affability, congeniality, being easygoing

Some people want to be agreeable and just don’t have a good idea what kind of vibe they’re putting out (e.g. the awkward). Other people developed disagreeableness as a strategy for keeping frightening people at bay (e.g. the gruff). And others are disagreeable as a side effect of other things they’re pursuing (e.g. the asshole). With such variety (and this is just off the top of my head), I’m guessing there will probably also be a variety of strategies to pursue in the course of becoming more agreeable. It may require a lot of work just to identify what’s causing your deficits in the first place before you start working on them.

Complementary virtues

Contrasting vices

Virtues possibly in tension

How to acquire or strengthen it

TBD

Notes and links

So you aren’t particularly agreeable? Maybe you can use that to your advantage rather than looking on it as a weakness. Consider:

Mentioned elsewhere

TBD

Inspirational quotes

TBD