If you have an iPhone I absolutely love the Apple TV remote app. Feels like the remote design was made for the phone. I wish other apps or console also let you use your phone to type or control
It feels like magic to have my TV turn on by a touch of my phone, and to also be able to control the TV when the kids think they are sneaky by not giving me back the remote.
Annoyingly, this does not apply to screen mirroring to the AppleTV.