I've always been rather ambidextrous when it comes to OSs (including mobile ones) but the final straw for me with Windows was 8. I like the idea of a full tablet computer (Apple, are you listening?) but Win 8 left me absolutely cold. So the wholesale move to Mac. That said, I understand your MS Office needs and, while my needs definitely don't require the full-meal deal as far as the suite is concerned, I did take Word and Excel with me. Dislike Pages and I still need the default file structure as used by most SOHO and businesses. So I'm OK with Mac. And really, the iOS's only real problem is its lack of something 'insanely great' - particularly in hardware, as the manufacturers of Android-powered services (especially with phones) seem to be able to knock out monthly.
All that said, in regards to Android's current OS offering, yes, I think that for Google's own Nexus range, the embedded apps should be as spare as possible - and certainly not produce 'doubles' of apps already part of the OS. Android's selling point to date has been its 'personalization' possibilities - so requiring users to use only Google services and apps and install bumpf feels very....Apple.
I don't mind Windows 8. The Start Screen is like a Quasi Mobile OS that gives me access to things like Instant PUSH Notification, Email over EAS, full cloud connectivity, etc.
The integration of SkyDrive into the File System is one of the most innovative things I've ever seen done on a Desktop Operating system.
I tend to switch devices and platform soften, but I've settled on Microsoft's services because of full EAS Support (Email, Calendar, Contacts, and T
asks - you listening Google?), perfect interoperability with a real PC operating system (Apple has this, on Mac), and the services' lack of dependence on any particular social network for full functionality (meaning no concessions are needed regardless of which platform I end up using, since I do tend to "get around" a lot).
I basically arrange my desktop apps on my Windows Taskbar the way most Mac users would use their Dock, and I almost never need to go to the start screen to open anything, anyways. If I use a Metro app, it's for a specific purpose, which I don't mind. Most mobile apps are designed similarly. Only difference is I don't have to use two devices to do something like easily share a picture to a Social Network.
I think most people assumed the OS would be a huge Wow factor. But it's, IMO, a rather mundane update that did nothing but give me some of the "Mobile Convenience" I liked on my Smartphone and put it on my PC, which has made me a bit more efficient at double fisting work and play from the same machine.
Currents is going away. I agree the Photos/Gallery thing is confusing. There are technical reasons for it (explained by others), but long-term Google really should figure out a way to consolidate the user-facing features into one app interface.
Google should lower the amount of apps it forces OEMs to load on certified devices, and that it itself loads on its own devices. Some of those apps are not even better than alternatives released by OEMs, which is why OEMs have taken to customizing the OS so aggressively.
Once SkyDrive brings Auto-Upload for Photos and Videos to Android, will there even be a reason to bother using Google+ for most people? Especially those who use Windows 8.1 PCs?
I personally have Play Music/TV/Books/Magazines/Games and Google+ disabled on my device. I don't even have Chrome, QuickOffice, Drive, Snapseed, Translate, Google Keyboard, or Keep installed. Hangouts set to not Auto-Update, but I will disable it if it comes with the 4.3 update on my device.
I only use mostly Gmail (for Play Store reciepts only), Maps + Earth, and Search (oh and YouTube, but only to view since it requires Google+ for anything else). Sync for everything except Gmail and App Data is turned off (since I don't use Google Calendar, Contacts, etc. at all).
Apart from that, I use Microsoft services because they work so well with Desktop Platforms without having to install redundant software (Chrome Browser) and in some cases (like SkyDrive) they are so well integrated at the OS level that it doesn't even make sense to use an alternative at this point... Provided an app is available for your mobile platform...
With the way I have things set up, I'd be equally productive on an Android, iOS, Windows Phone, or Blackberry 10 device. And the choice that gives me is quite comforting...
I use my iCloud email account for Spam and Online Accounts (set them up then delete the alias I used for that, and never have to worry about getting email from them

), auto-forwarded to Outlook.com...