Recently I've found myself in situations as a shadow priest where people are wanting me to interrupt something. My current build is 10/0/31 with no points in either Improved Psychic Scream or, obviously, Silence. With a long cooldown and me needing to move 3 points around I've never really felt the need to change anything but some people are surprised when I can't interrupt anything. I'd probably end up taking a the point out of Inner Sanctum (who cares) and two points out of Veiled Shadows which I really don't want to do.
Does anyone else spec in to Silence for PvE?