[@SomeChap]

Hell, any psyker that isn't an Eldar (Ancient cheating space elves that they are), Librarian (They might go traitor, but I've not heard of them exploding overly often), and Chaos Sorcerers (Right proper ones, not the crazy witches and unsanctioned psykers that explode even faster than Sanctioned Psykers do) has this nasty habit of meeting a terrible fate. Blessed with suck, indeed. Ork wierdboyz? Literally will 'eadbang if too much latent build up happens. Already discussed the majority of Imperial psykers, chaos non Sorcerers tend to live short, daemon filled lives, if it wasn't for all the nifty powers, and being born with it, seriously doubt most folks would willingly go into that field.

Khorne is probably the safest of the four, since as long as you're killing for the Blood God, the mutations are relatively tame in comparison to the other three. Tzeentch is literally sorcery, mutation, scheming and all that, so good luck not becoming a mass of mutated flesh. Nurgle, well, we've beaten that horse enough to prevent even the plague from raising it from the dead. Slaanesh is, well, when talking about a god of excess, in all things, that tends to not end very well for any party even remotely involved. And somebody help those poor sods that still try to pull the whole Malice/Malik thing of chaos turned on chaos. Almost no one seems to remember him, and enjoy having pretty much [i]everyone[/i] in the universe hate you.