I think it depends a lot on usage, I have a "real email" and consider my gmail address as "disposable", I use it to sign up for websites etc, whenever a form as

I think it depends a lot on usage, I have a "real email" and consider my gmail address as "disposable", I use it to sign up for websites etc, whenever a form ask me to include an email address I will use my gmail address - the only time I ever log in to it is when I need to reset a password or similar. It is full of spam.