Thinking about this issue, it think of a couple concerns or worries when thinking about this.
1. How will it affect my child
I don't think this would have much impact. It didn't effect my sons toilet training. Long term I worry about it causing difficulty with peers. But in all honesty, if kids want to tease or bully him, they will find any excuse to do it. Also if I model being confident in diapers, it may help him to be more confident and accepting of himself. I also think it will help him to have more empathy for individuals with disabilities and be able to see them as more then a disability.
2. How will it affect my relationship with my child
If you have a positive relationship with your child, provide love, care, support and consistency, and attention, it won't matter whether you are in a diaper or not. They will love you for everything else you do.
3. How will it affect how my child sees me.
I think my son will see this as only part of who I am not the whole me. He will know the kind part, the smartass, the geek, and as his father. I think how your son sees you is going to go way beyond whether or not you wear diapers.
Ultimately I think that wearing diapers just provides another opportunity to teach my son to be an adult and a good person.