Eric, that's a good point you make, martial effectiveness isn't an end all determiner.
I regard it pretty highly, personally, as I tend to seek my philosophy from who I consider the best philosophers and my fighting from who I consider the best fighters, but, I must remember that by far my most skilled and favorite instructor is also a man of absolute integrity (the two go hand in hand very well).
I forgot that in Aikido things are a bit different in the sense of evaluating martial effectiveness and that the integrity of a person is tied in more tightly than mma at large. The question deserves it's own thread, and I done made it. =D