Jessica because I've never liked the "fer" ending in
Jennifer.
Jennie because it sounds more feminine and sweeter. My only issue with
Jennifer is the last syllalble,
Jessie is a little masculine.
I think I'd pick
Jenna over
Jessa,
Jessie, etc.
Although I prefer
Jessica and objectively like it, I'd rather have my fingernails pulled out than use it. So, so tired of it. I have known so many.