Ask HN: Personal todo list solution to replace Google Tasks?

I've been using Google Tasks for a number of years now and I'm a bit tired of it's simplicity and slow speed. I've been using Asana at work and now I'm inspired to find something similar but just for me.

I'm looking for a task list with:

* Fast mobile app and web interface. Speed is of the essence. I want to be out and about and realize I need something, whip out my phone, and add it in a matter of seconds.

* Ability to organize tasks by priority (via drag and drop, etc), if drag and drop works on the phone, that's a plus

*Ability to mark/organize tasks for "get done today" "tomorrow" "sometime this week", etc.