From the fluff point of view, which of the generic
BRB Psychic disciplines would you want to be the master of?
(A quick reference for those who never paid much attention to the Psyker powers, click on the names of the disciplines for a more accurate description about them)
Biomancy-Anything that bleeds is mine to control.
Divination-I already know what you're gonna do before you even know what you're gonna do.
Pyromancy-BURN, BABY, BURN!
Telekinesis-I can use the Force.
Telepathy-Your mind is a lot emptier then I thought...