In FFXIV, I switched from keyboard to gamepad after having a hard time dodging landslides in Navel (normal). I still use a mouse as a supplement from time to time (like when dropping ground AOE), or when interacting with menus. And, of course, keyboard is still used for typing. So, all 3 are used (primarily gamepad, with mouse and keyboard as supplements).

In WoW and SWTOR, I use keyboard primarily, though it still gets annoying sometimes to dodge stuff. I tried the controller addon in WoW and it's not good for me. I supplement with mouse for those extra action buttons that appear from time to time.