No fee to pay
7gb of storage
next to zero spam as it has a superb filter, the junk mail box is cleared every 30 days so you can check for false positives, but these rarely happen.
If spam does go in your inbox you can mark it as spam in the web client and future mail from the same sender will go in the junk mail. Sometimes the software is clever enough to see there's an unsubscribe address and if it's safe to use will send a request for you.
Gmail also works with most software email programs, and can collect mail from other accounts for you.
I've been using Gmail from the early beta stage in 2004 and wouldn't go anywhere else for email