I love
Isabella. I can't decide between
Izzy,
Bella, or
Isa for it, but I love all those nicknames.
It's common where I live. I know at least one baby
Isabella. I don't know any who spell it
Isabela but I think it's really pretty that way.
I probably wouldn't use it because I love so many names more, but it's so beautiful I celebrate to see it used at all. It's great as a middle name.
I don't know if I prefer
Isabel or
Isabella, but I love both. I like
Isabel spelled
Isabel,
Isabell, and
Isabelle, but think
Isobel is silly and pretentious.
Isabella's better than
Isadora. I pronounce
Isidora and
Isadora slightly differently, and may prefer
Isidora.
I used to pretend I preferred
Isidora, because it was less common, but I was lying to myself. :)