I am a nicknamer, but I have several full names I prefer without. I don't think it's as easy to do, because people do tend to like to shorten or make things sound affectionate. I wouldn't use a name if I didn't like all semi obvious nickname options.
My son is
John, not
Johnny by his choice.
I've known
William,
Nicholas,
Elizabeth,
Kathryn et al,
Oliver,
Richard,
David (actually haven't met a
Dave under 30),
Margarethe, and
Victoria without them.
Best without a nickname:
NicholasSamuelFrederickStephenMatthewMichaelThomasVincent
I can't think of any girl ones though I know they are out there.
~Anna~