When my fingers hurt after too much time on the keyboard, I...

Weeeeell, I never experienced pain from typing too much.
I get those from writing too much LOL.

I get bored faster than being tired from typing. And I get tired faster when typing on android devices than PC/laptop keyboard.

Additionally, typing on PC/laptop keyboard, for me, is seriously faster than typing on android devices.

Started to type faster than average through chatting friends online since way back in 5th grade. Mostly from other countries so I had to learn English the way people would understand me. Being a bookworm helps.