I wouldn't really have a problem sharing an email address with my wife. However, I would rather not. Sharing an email would mean that I would have to sort through her mail to get mine each time I log in. To save time and effort I would suggest that each partner has their own.
I wouldn't do it. I find it very confusing when other people do it! I think it's generally only older folks who share an email address, when one of them maybe isn't as computer-happy as the other. Having said that, my parents used to share an address for exactly that reason but my mum (in her late 70s) found it so frustrating having to wait for dad to get her email for her that it acted as a spur for her to get her own laptop and email and get online for herself.
For me, it's not about privacy so much as convenience.
I did it once with my husband, but it just got too confusing. I don't care about the privacy thing, but when I ordered birthday gifts online for him, I obviously didn't want him to see the orders, so we now have separate emails. My parents have the same email address and don't have any issues, as they don't use their email much.
I don't share an email with my partner, it's nothing to do with privacy though, and everything to do with independence. Plus he gets emails from his work and I get emails about hubgarden, appointments for the kid's health, emails from women for a series of articles I've been working on …. too much work to sift through his boring emails to find my interesting ones!
I really don't know about this.
Very grey area.
I understand the need for privacy, I think if you both have your own friends and interests then it could work well.
I have also heard a few stories of husbands seeking other ladies on line, and they have the chance using of course their own email.
In this case, there is no one answer.
It has to be worked out by the couple, because it is a very grey area.