I've been using CyanogenMod and now LineageOS since my first Android phone, and I love it over OEM. I'm unfortunatly still tied to GApps, but at this point it's basically contacts and calendar sync along with Maps, along with a random Play-store-only app (e.g. Transit). (I find almost everything I need in F-Droid.) (Yes, I have OSMand and offline maps, but I still like Google Maps for some things.)
My biggest problem right now is finding an Android phone smaller than 5", preferably under 4½", that I can both install lineageOS on and actually purchase :-\
I hate how Google Contacts and Calendar are so much superior to any other offer. I can easily find alternative to everything google except for those two.
Especially true with Contacts I feel like I'm doxing everybody I add to it. I have tried many alternative, but nothing even remotely measure to it.
I personally find Gmail and Drive to also be superior offerings. The only problem I have with either is privacy.
Gmail's integration with Drive and Calendar are really nice. It's a very mature web email app besides all that. It's not hard to find other email solutions, but in my experience they lack the polish and integration that makes Gmail so valuable.
I have been looking for a good zero-knowledge cloud storage solution that fit my requirements for a while. All of the alternatives I've tried have severe limitations or unresolved issues.
My biggest problem right now is finding an Android phone smaller than 5", preferably under 4½", that I can both install lineageOS on and actually purchase :-\