> Gmail + Google Calendar + Chrome + Google Drive + Google Search + Google Docs + Android Phone + Google Maps + ...
What about: Gmail + Google Calendar + Firefox + Dropbox/Wuala + DuckDuckGo + Live Docs + Android Phone + Nokia Maps + ...
Of course, you could go Google free if you want, I just pointed the alternative that doesn't regress in usability and convenience from what you currently use.
I've been looking for a good, self-hosted version of Gmail that can replace my POP for a while, but the main reason why the lure of Google is so strong is convenience. And cost. And to some extent, reliability. Living a Google-free life is definitely doable but it can come at a cost (time, expense, convenience, functionality, reliability). That's the main tradeoff.
GMail supports IMAP, but then so do many other mail servers.
(You can also use a web front end like RoundCube, if you want to.)