Yahoo has been found to censor certain emails for corporate interests. So.. if you're into that sort of thing.
Gmail and it isn't even close. Used both. It's also advantageous to begin the migration to Google for anything you can because that's the future. Upload your shit to the cloud, too.
why the hell is this in this section? lol yahoo, gmail, its all the same IMO. i have both, use yahoo the must though just because its linked to more accounts.
I prefer Gmail because it loads faster and it generally does not require a password it also does not have a little looser spell checker on the side that pisses me off... random but it has more features!
I think Gmail is way cleaner and easier to operate. Everything except Yahoo! fantasy sports is halfway decent.