Random question, but this seems as good a place as any to take a straw poll. My twins are 9 months old and I often struggle with whether to introduce them by their full names or their nicknames. We picked their namesVivienne and Philippain part because the full versions feel quite compatible in style and length. I love their full names, though at home they're often shortened to Pip/Pippa and Vivi, which I also like as I feel they suit their baby selves a bit more than their very grown-up full ones. The trouble is knowing which version to use for a first introduction. Usually my default is to introduce them as Pippa and Vivienne as 'Vivi' feels quite nicknamey and Philippa feels quite formal. However, I get a lot of odd looks when I introduce them that way because I'm sure people are wondering how one twin got the flowery long name and the other got a nickname. I'm thinking I should probably choose either both nicknames or both full names, not just because of the odd looks but also because I'm a bit of a nerd and the asymmetry bugs me.
What would you go with? Is it weirdly formal to introduce with full names?