I'm going to guess that extroverts get noticed first, but introverts grow in appeal over time.

I'm on my second cup of coffee and I still don't know, although my first thought was, "Appealing to whom?" Romantically? Platonically? In business? As neighbors? An argument could be made for each, but I think in general we're taught that extroverts are more sincere since it seems they're guileless and their emotions seem more apparent, whereas introverts are alluded to being more secretive and thus less trustworthy. All of those assumptions are wrong, but we still like to see them portrayed that way in movies, and it probably carries into our personal lives more than we'd admit.

Personally, I'm more of an ambivert, and my relationships have been with both extroverts and introverts. I found them both do-able. Has something happened that's led you to ponder this issue?

Honestly, I think it varies person-to-person. Each person has their own varied tastes. Boy, could my comment sound more trite LOL. I'm more introverted; my ex of way too long was more extroverted. My now significant other is more introverted. So, I don't know. I really don't. Unity,I need more tea. Interesting question now that I've rambled through it.