I actually prefer to be similar with each other. Since we're twin while we might look similar but personality wise we're very different like day and night so it won't be hard to know who is who. And yes we share the same wishes. We wish that we would have our own body to do thing together ( Especially for her that sometimes she wish to physically smack me when I overspend or something-)
Luckily for us (me and woman who I share my body with), We are 'twin' so we don't really have problem with our physical face however sometimes I did I wish my body would be a bit more 'androgynous' but I'm doing fine with our physical body!
I almost exclusively use 'I' instead of 'we' most of the time since I'm the on doing the talk and women that I share my body with does not like to use social media. But will use 'We' when it's both something we're agreed with or share the same opinions.
If we need to talk about ourselves separately we just use our name instead of 'I' and just use 'I' only for someone who doesn't know that she share her brain cell with me lol