What are the characteristics or qualities typically embodied in the bundle personality?
Shared with the bowl are intensity of character and an incredible self-sufficiency. Accompanying these traits are independence and high self-esteem.
A bundle cannot contain an opposition aspect. Therefore life can be seen only from the point of view of self. Lack of perspective, enclosure in a private world. Highly focused on a limited slice of life.
But here is the key. I quote from Jones; he says it so well:
This type is the "creator or proponent of an exclusive and well-ordered world within which his own immediate competence or superiority may have constant manifestation...."
It depends on what we mean by perspective. All of us can access the world and others only through ourselves, so an opposition shows how someone needs to perceive another person or what they want/invite from them, etc rather than the actual ability to see people for who they are. Natives with oppositions may or may not get to a point in their life when they recognize their projections and relationship patterns, etc.
Jones also says "While the bundle temperament identifies the most concentrated rather than the broadest spread of self-realization, this does not imply that the native is at all provincial or incapable of a well-rounded development. What is revealed instead is a tendency to self-fulfillment in an unusually selective ordering of his own affairs."
I think the bundle chart explores by full immersion into an experience, which is different from the balancing, one-foot-here-and-one-foot-there approach of the see-saw, for example. But with time, we will go full circle, too, and will have the possibility to immerse into different kinds of experiences (we will have friendships, we will develop skills, we will get married, have kids, and so on). So, like any other native, we too may or may not develop a greater perspective.
I understand that for someone as scientifically minded as Jones this full immersion into experience would translate into competence, but I don't think that even for him this automatically becomes a sense of superiority (he uses "or").
Natives with any kind of chart can develop a superiority complex. Bobby Fischer comes to mind. Maybe the chart pattern rather
shows how it will manifest. I know someone with a see-saw chart and a grand trine in water who thinks she knows everything better than everybody else. She tried to crush several marriages in her family because she decided they were not ideal for each other, she despises anybody who doesn't accept her latest revelations as higher wisdom, etc. She recently made a youtube video in which she gives a solution to all current problems of the world in about 20 minutes and considers herself a spiritual leader (she's in her late thirties). At least your guy has his limits, lol.