Joan is just alright for me. It's mostly in look because I like the sound a lot. I prefer
Jane.
But I do really like
Joanna. I never took much notice of it until I had a friend in college by that name. She was sweet and pretty and a very good violin player, so now that's the image I get from
Joanna.
I also like
Johanna a lot (prn. like Jo+Hannah). It's much lighter and more open than
Joanna, and it's very kind and smiley and friendly. I had a good friend throughout school with that name, so I have a good association with it, too.