I seriously think Frank Horrigan is one of (if not the) most badass villains ever. He looks so incredibly sinister, and I think they did a really good job on his voice effects in Fallout 2. In case you don't remember, here is a little screenshot and sound clip of Frank Horrigan: http://frankhorrigan.ytmnd.com/ The Master in Fallout 1 was pretty good too. Seems like they really know how to make an "evil" end-boss. Both were very convincing.