Mindfire
Istar
Going against the grain here. It's a tool, just like any other. Use it when you need it.
Sometimes a villain POV is the only way to give the reader some crucial information or show how great a threat the villain is. If the main character can't know something that you need the reader to know, a villain POV is a great cheat to use to get that exposition in. Particularly if the villain and hero are separated by a great distance and/or have no real personal connection. It also gives an opportunity for dramatic irony: the reader knows of an oncoming tragedy while the character does not. This is, I think, an underrated way of creating tension.
Sometimes a villain POV is the only way to give the reader some crucial information or show how great a threat the villain is. If the main character can't know something that you need the reader to know, a villain POV is a great cheat to use to get that exposition in. Particularly if the villain and hero are separated by a great distance and/or have no real personal connection. It also gives an opportunity for dramatic irony: the reader knows of an oncoming tragedy while the character does not. This is, I think, an underrated way of creating tension.