Gmail is fantastic, and you're pretty much guaranteed it'll always work. My main personal email is still my old mac.com email, which I'll be keeping forever, but I use one of a couple gmails for professional uses.
I've had domain hosting many times before, and still own a domain name, but I've found that the email service is usually unreliable, and usually depends on your ISP's outgoing mail server - a HORRIBLY outdated system that only compounds the unreliability. I can count on Google - even when my mac.com goes out, I've still got gmail, and it always works with every device I have had. Always, Perfectly. Never a hiccup. Can't say the same for any single other email I've had, yahoo, hotmail, mac, and numerous domain hosted ones.
...and follow the previously posted instructions to opt out of info gathering.