Psionics is, to me, a very intriguing idea. I do like that psionics are on a more equal footing with magic in 3e, but I have an extreme distaste for it being even remotely similar to magic.
IMC, there are three approaches to achieving one's goals - following the physical laws of the universe (technology), finding loopholes in the physical laws of the universe (psionics), and just outright breaking the physical laws of the universe (magic). Each is similar, but they have radically different ideals and approaches to doing the same thing.