Worth it to change first name?

My husband and I are discussing renaming our 3 year old. However, we aren't sure it is worth it because we want to change to a variation of his current name. As an example, imagine our son is named Michael and we call him Mike but we also call him Michaelangelo often but never Michael. His current name is very high in popularity while the variant is much less common and "stronger" sounding.Any perspective on if it is worth the hassle of getting it legally changed? We live in the United States (TN, specifically) if that helps. If it was a matter of just waving a wand, we'd do it in a heartbeat but I know it can be more complex than that.Thanks!Edit for clarity: continuing the above example, we want to change from Michael to Michaelangelo. We never use the name Michael and it honestly sounds weird to refer to him as Michael. His personality fits Michaelangeo much better - but if he already goes by Mike most of the time anyways, does it really matter? via /r/Parenting http://ift.tt/2mBjcEZ