Thanks so much for all the suggestions about reading the letters and then putting them in gift bags on Bid Day, etc. That's exactly the kind of personalization I was looking for.
Also, because some people asked, we do not have a specific preference ceremony we have to follow. Usually we find stuff on our organization website and look at past preferences and come up with one unique to that year. And we do include personal testimonies. I don't think our pref is bad, I just think it needs to be more special for PNMs, and having our members say something nice about them in front of everyone sounds like a really great way to help with that.