what's your favorite middle name?

Boy-Jason

Girl-Elizabeth 

Are my favroite middle names.

Depends on the first name. I like to have names that aren’t so common Marie, Lynn, Jane all are boring . ( along  with James and Michael) 

Middle names I like 

Corinne
Delaney 
Mariah 
Everly

Blake 
Parker
Weston 
Silas

For a girl, Pearl, it's short and simple so it goes with a lot of names but it's also uncommon and classy. 

For a boy, Alexander. I love the name but it's a bit too popular for me to use as a first name. 

The middle name is the one that you're allowed to go crazy with. Not enough people do that.
You can call your child Tom Rodgers or Jane Smith, and it won't be a big deal in their lives. Seemingly few people realise that the middle name can be as wacky as you like.
Aeolis, Rapunzel, Epsilon, Praxis, Saturnalia, Terramorphous. Middlename.
I think that would be my favorite middle name. "Middlename". What a brilliant commentary on social tradition. Your middle name is the only one you have any control over (unless you officially change your name, of course...). It almost never comes up unless you bring it up, and nobody cares too much about it. If there is indeed any reason behind having a middle name, surely it is individuality.

Sebastian.       

Thomas and Tiberius would be my favourite middle name. Because they reminded me of Commander William T. Riker and Captain James T. Kirk from Star Trek.