It has more to do with my privacy than anything else, I suppose. My online information is largely kept in a couple of silos that, for most purposes, never really interact. As this (www.vocativ.com) article states, Google likely knows more about me than the NSA (or any person, really, including my family). I find that idea supremely disconcerting. I don't mind providing personal data to a service online if I have some reasonable expectation of control of that data (say: the ability wipe my email and expect to to actually be deleted, which is not provided for inside gmail. or the expectation that my Home/Away status from my thermostat is not linked to the registered address provided for my Google Wallet account). None of these things are allowed inside Google. They collect every scrap of information they can get their hands on about you and collate it into one file, and you don't get any control.

I'll happily pay for services like email/calendaring/web hosting/etc if it means I have control over its interaction/life span/use. Fastmail works great for my email, Fruux keeps my contacts and calendar synced, OTR provides a secure way of using GTalk without being spied on, and my NAS obviates the need for Google Drive. Once I find a place to store my recipe archive, I'll be taking steps to remove myself from Google's ecosystem entirely, which will definitely take some time. You are right, however, that it is an ideological pursuit. The simplicity and efficiency of a shared single ecosystem are outweighed by my fear of its eventual corruption or misuse.

Final thought: I readily admit that Amazon knows everything there is to know about my spending habits. However, they also don't get to see my emails to friends, internet search history, or my plans for Friday night. Individual silos are something I've learned to deal with. Aggregate data about everything in my life? I don't want any part of that.