I can hear the artifacts of most music recorded at 128kbps. The "swooshing" of cymbals and other high frequency instruments, sibilance of vocals sometimes turns into pitches, and a general feeling of a loss of "depth" of the recording. I don't hear nearly as much at 160kbps, and 192 sounds pretty good. I compress my songs at 192.
Hey, but if you don't here it then it ain't there!