What's your reason?

DH and I have a lot of great, classic names in our families, but they're all VERY common/popular. For me, classic is different than trendy, and I'd name a kiddo one of our classic, "popular" family names. This mostly applies to us for boy names.

For girl names, we don't have as many that we'd use in our family trees, but I tend to like pretty classic, popular ones there, too.

Just curious about why you stay away from popular names....and if you have any caveats (classic, family, etc) to your rule.