I started playing this game using the numpad to move-- FF11 was extremely cumbersome with its WASD keys, and the default was actually the numpad - so I got used to that, and used it for a long long time... into wow before i eventually switched. Cant believe i ever played that way TBH, lol. But I was so used to it from years of FF11... it just stuck for so long.
Anyways, now I use WASD...
But I have pretty specific keys for specific things (which is present across ALL mmos I play)
1-6: Main attacks
7 sometimes buffs/weird abilities
Alt 1-3, primary abilities and/or defensive
Alt 4 Decursive, no other alt+num keys
Control 1-4 Rarely used, here just buffs
Travel = T, Shift T for teleport alternates
H for primary defensive
V=Buildups, E=an AoE, Q = a single target buff/debuff/ground target, Alt+E = big buff nowadays hasten, Alt+q=big self buff usually Domination
Those rarely get used.