I just moved from a L950 to a Nexus6P. Still trying to "move in". The biggest issue I see so far is with the Outlook app for Android.
I like to keep my work and private lives separate. I have my personal mail flowing into my Outlook.com account, along with my personal calendar items. I have my business mail flowing into my Gmail account along with my work calendar items. On WP, it worked fine. In getting ready to move to Android, I decided to import all my contacts from my MS account into Gmail so they're all in one place. But mail and calendars were left untouched.
Once I got my Nexus, I used my Google account and added my MS account, like stated, as an Exchange client. When I open the default android Mail app, I can switch inbox views between both accounts. No problem. When I open the default droid calendar app, I see items from both accounts populating my calendar...BUT, the calendar items from my MS account, all show as one color! So I can't distinguish say my "birthdays" calendar from my "kids" from my "personal". The calendar items from my Google account are color coded. I see no way to make the different calendar items from my MS account color coded.
Ok, I figured I'll try the Outlook app for Android instead. Mail, no problem, I get separate mail for both my MS and Gmail accounts. But the calendar, for some reason, I only get one of my three MS calendars showing up in the Outlook app. Any ideas why this might be?