I love Gmail. I also have Yahoo mail, but I now keep it as my spam receptacle. I've been a user of Yahoo mail for a few years, and I am not sorry to trash it up now.
Why Gmail is better than Yahoo mail?
--Gmail notification is better, does not require using Messenger.
--Gmail allows POP3 without extra charge, Yahoo mail wants $20 /yr subscription to MailPlus! before you can do that
--Gmail gives you 1GB of space, Yahoo only 250MB. When I originally signed up for Y! mail, they gave me 6MB, and quite often my mailbox was full from all the spam flying around. I noticed last year that new Y! mail subscribers only got 4MB of storage. Only when Gmail launched with 1GB, Yahoo decided they have to up the user space, or everyone would flee. Sure 250MB is good, but 1GB is four times more, therefore better.
--Gmail has keyboard shortcuts that allow you to navigate your messages w/o using the mouse. Most people probably don't care, but I know there are UNIX geeks out there who are thrilled.
PM me if you want a Gmail account. I have 6 invites, and everyone I know either has one, or doesn't know what to do with another email account.