I have looked at asteroids and planetoids a fair bit. Of course, you have to start with the "majors" before moving onto the "minors". Here is my take on them.
1. Chiron does deal with wounding, both literal and metaphorical. Ideally it also shows where and how we can gain in wisdom subsequent to our wounding experiences.
I used to ignore Chiron until I broke my ankle while hiking in 2007. I couldn't find a cause for it using conventional planets. Mercury rules walking, and I have Mercury in Aquarius, which rules the ankles. Chiron conjuncted my mercury when the accident happened. A few months later I had a botched biopsy in which Chiron also seemed to be involved.
2. Juno shows conventional marriage ( even if "common law"), and often in a kind of jealous light.
3. Pallas shows a kind of faculty for discriminating, analytical thinking. Apparently it does show up prominently in charts of people with autism, where this faculty is out of kilter.
4. Ceres really isn't understood well at this time. She was upgraded in 2006 to the status of a dwarf planet.R4ven's post on her is worth following up on. Ceres is prominent in the charts of professional foodies Martha Stewart and Julia Child; but she is also prominent in some natural disaster charts and periods when people are grieving. Mythological Ceres was not only the goddess of grain, but she was also called "the law giver."
5. I really don't have a feel for Vesta in the chart. A lot of unscholarly suppositions have been written about vestal virgins, so I would suggest caution.
6. With other asteroids named for mythological figures like Psyche and Eros, try to grasp the underlying mythology, then look to see how it resonates in your chart.
7. Personal name asteroids get really interesting. Not everybody has one, and then you have to consider cognate names. For example, for the name "Jane" you have to look at Joan, Johanna, Jeanne, Jean, Janet, Jennette, &c to see what, if any asteroids turn up. Your namesake asteroid may or may not ring a bell in your own chart, but check it out in the charts of family members and S0s.
8. A lot more research needs to be done on the trans-Plutonians. Their signs will be generational because their orbits take so long to complete. But aspects to personal planets may be meaningful.