Switched to The Darkside

I've been with iOS since the beginning, dabbled in android here & there along the way, but I'm sticking to my guns that iOS is an overall smoother, superior experience.
Were you able to jailbreak?

Apps:

Google Photos (You only start with 5GB of iCloud space, but Google Photos gives you unlimited space for your pictures) 
DeviantArt has a mobile app if you're into that 
If you use Twitter, their app is fine, but if you'd like more features TweetBot is the most popular
VSCOCam
Fantastical (Better Calendar app)
WeatherBug (Better Weather app)



Jailbreak tweaks:
[Apple File Conduit "2" for root folder access over USB / OpenSSH for wireless root access with SSH servers]

Acapella 2 (Gesture music controls, hide music playing UI, etc)
Anemone (all in one theming platform; themes dock, badges, folder, apps, etc)
BatteryLife, BytaFont 3 (change system font)
CClean & CCloader (tweaks the Control Center)
Eclipse 3 (change system-wide UI colors)
Flex 2 (download patches to tweak just about anything)
Fern (Android-esque app drawer)
HideMeX & Springtomize 3 (Hide or modify UI)
iCleaner Pro (tidies up your device by removing caches and other unnecessary junk) 
iFile / Filza (navigate the filesystem)
Leash (tweaks the Notification Center)
LockHTML4 (Different clock widgets for the LS)
Messages Customizer Pro (tweak the messages app)
Moveable9 & OpenNotifier9 (Android-esque notification badges in the status bar)
Priority Hub (LS notifications are grouped by app instead of that ugly scrolling list)
SafeTexting (read receipt options for iMessage)
SwipeExpander (Gesture keyboard options)
StatusVol 2 (thinner volume HUD)
TinyBar (cuts notification banner size down)
VirtualHome 8 n 9 (Actions for TouchID, such as tapping the sensor to mimic home button press)


Resources:
ideviceart.com
idevicewalls.com
[6S/6Sp high resolution walls]
If you use reddit /r/iOSThemes /r/Jailbreak /r/iPhone are good subs for keeping on top of iPhone news, tweaks, etc.