What's your favourite new 8.1 feature?

[Ashish Gupta888]

App Storage in SD Card
Notification Center: No need to pin most of the tiles to start screen. That way, it allows me to pin those tiles that are customized with transparent screen functionality.
Three Column Tiles for my L525: Awesome
Cortana: Though its still not available in India, but I like to play around with her ;-)
Swype Keyboard: Don't use it a lot, but like to show it off to my Droid buddies
Quiet hours and inner circles: This gave me freedom to use customized flight mode, I would say

 

[WanderingTraveler]

The three-column layout.

I've always liked having the WP7 layout.

 

[Dantekai14]

Preview for Developers (if this counts)
otherwise
nothing in particular.

 

[SammyD97]

Preview for Developers (if this counts)
otherwise
nothing in particular.

Lol. That doesn't count and I think Preview for Developers was available before 8.1

 

[Dantekai14]

Lol. That doesn't count and I think Preview for Developers was available before 8.1

My bad.
Then I'll go with the feature I use most.

Notification.