I have accounts on both but now I use the gmail because some sites that Im joining is preferring gmail over yahoo mail. They say its faster email when you use gmail.
i'm goint with gmail, because they haven't got that many advertising banner and it's loading a lot faster than yahoo mail, much faster , i vote for Gmail
I used both email provider. For me they are both fair since they were having unique feature and specialties. My yahoomail is already 10 years old and I am using it for my personal contacts. And I am using gmail on other transaction online. Good thing about gmail is the group, it is easy for me to use it and also the text and phone call feature, also the background. On yahoomail, it's the spam that I don't like the most.
I have accounts in both gmail and yahoo. I like yahoo. I am using it for the last 6 years. The new design of yahoo mail is very nice. Gmail is fast and has a lot of storage space. Though i did not have any problem with storage in yahoo as i never reached the maximum limit.