I definitely use Caps Lock. Its original purpose is not only useless but even harmful, as I press it accidentally too often. Thus, I've remapped it to write accented letters: it's easy because it's not too far to reach and I can hold it with my left hand while I type the accented letters with my right. It now works like this both on console and X.
I'm curious to know how you did to map your capslock key to do that, could you point me to revelent infos or tell me what to do to get that behaviour too?