We don't use Sprint 1, Sprint 2... Our sprints have names, which are based around a theme. So, one team has a release theme of 'Wonders of the world', so each sprint is named after a world wonder, another has a Release named after a Rick James album, so each sprint is titled after a song from the album. Being able to call a sprint 'The Great Pyramids' or 'Love Interlude' means more to the team, PO, stakeholders and business than 'Sprint 1/2/3' does.
I'm sure this is a 'nice to have', but I thought I'd throw it in the mix for the next Fedex day. ;)
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