I'd say don't put too much store in personality testing - it can indicate traits and so on, but what really counts is how motivated you are and your aptitude for the physical and mental demands of the job.
As far as crewed ops go, all kinds of personality types can and do fit in, as long as they're not too extreme - you get the loud boisterous types and the quiet ones, and all points in between.
Leave the conjecture to the psychs and just give it your best go, if you really want to make a career of it.
Being an introvert isn't necessarily a drawback in flying as long as you're not too timid to speak up when you need to. I'd probably rather fly with someone who's slightly reserved than a loud 'I-am' type.