I've been a Mac user since 2004 and as a convert I can tell you that EVERYTHING I've tried with the Mac is so much simpler. So much so that there is an "unlearn" period from Windows. I can only imagine it's like being in prison for 5 years and you have to just readjust. FREE AT LAST!
I got .mac because I wanted to stop changing email addresses and I've always thought that people who use Yahoo email as their main address were cheap.

SO! I go it and I have to tell you that website creation using iWeb is a snatch! Wait, cinch! Yes, cinch. As is everything else it does, including iDisk.
When they transitioned .mac to MobileMe I was really set to be annoyed and disappointed, but everything has been working perfectly. I love it! I get mail and contacts and calendar and I don't sync my iPhone as much. Everything is just all updated. It causes me to use the calendar more, too, which makes me more organized.
Also? Networking Macs is WAY easier than with Windows. I've never been able to successfully network Windows computers, which isn't that big of a deal, I'm not a network guy. But I've been able to network and share drives on my Macs since day 1.
Welcome...I've always said I'll gladly help any switcher that needs it and I will. Feel free to PM me and I will answer questions or you can drop me a message on iChat.