After all the upgrades of the other email services I still prefer Gmail over the rest. I get too much junk mail with Yahoo, and Hotmail is difficult access because of the heavy load of the interface. The other mail services have increased their amount of space past what Gmail offers, and Yahoo offers unlimited space unlike the 3.1 GB you have with Gmail. In reality its not unlimited space, there will be a limit which can be reached but we don’t know how much it is.

With Gmail you can upgrade your amount of space based on payment, and the amounts are very decent for the amount of space. 

• 10 GB ($20.00 USD per year) 
• 40 GB ($75.00 USD per year)  
• 150 GB ($250.00 USD per year)  
• 400 GB ($500.00 USD per year) 

Right now I’m not in need of extra space, but there is an option to upgrade which is good.

At this point Gmail is upgrading all their space, so with the free account your storage will bump to 6 GB by Jan of 2008. And also the premium accounts will be upgraded so the 10 GB will become 25 GB.

Link: LifeHacker