Originally, I thought of power sources as guidelines, but when they showed up as keywords... well, that implies mechanical affects - maybe not now, but potentially later. And this bothers me. Mainly it bothers me because I don't think they were used rationally in all cases. All fighter powers are martial -- even the one that has the "charm" keyword (which implies by its nature some kind of mental control - and I'm not sure what kind of natural "martial" sword swinging allows you to control someone else's mind). All ranger powers are martial, even one with the illusion keyword. I have no problem with epic level rangers drawing in the natural powers of the feywild to cloak themselves in mist or rogues "teleporting" by stepping from shadow to shadow, but for pity's sake, those just aren't "martial" powers as far as I'm concerned. I'm just not sure why they didn't bother to allow some classes to flex a little bit, especially at epic levels. This stuff also bothers me because it implies that none of the paladin's powers (for example) are drawn from his skill at arms. It just seems weird to me.
One thing I haven't seen is "mind affecting" or "language dependent" as key words. Those made a lot of sense to me, and certainly would fit more under the "martial" guise.
One thing I haven't seen is "mind affecting" or "language dependent" as key words. Those made a lot of sense to me, and certainly would fit more under the "martial" guise.