I tend not to like shortened names. There are beautiful traditional names that are usually shortened, which spoils them for me. Examples that spring to mind are Nicholas, Christopher, Benjamin and Elizabeth - rarely used in their full form.
We have Davids, Andrews and a Peter in our family. .Heaven help anyone who tries to shorten those! They wouldn’t stand for it. My sons have three-syllable names (not the ones I mention above) that are shortened by almost everyone except me.
My son and DIL rejected the name Charles for their son because they knew everyone would call him Charlie, which they didn’t like. I had rejected Charles for that son, because his middle name was going to be Philip, and we thought it sounded a bit too royal! In the end no-one’s called Charles in our family.