Particularly if you have older kids. I know some people deliberately chose more unusual names 10 years ago only for them to become massively popular a few years later!
I still love all my DC's names and actually although I didn't choose my middle dd's name (her Dad loved it and I gave in) but it really suits her and despite it apparently being hugely popular I don't know that many Jessicas.
I know a lovely girl named Brittany aged 13 but her surname rhymes with Spears (who wasn't known when she named her dd) so she regrets it now!