Which enemy do you fear/hate more, the Assaultron or Sentry Bot? Why?

Honestly, Assaultrons freak me out more, especially the Assaultron Dominators. Their sword-like hands and invisibility make it really difficult to kill, and I'm playing on a high level character. Oh, and don't even get me STARTED on legendary Assaultrons. I was doing a mission when I came across one in a closed space, and I kept dying to its explosion. I almost cheated when I finally escaped its final attack. Sentry bots may have more firepower, but they are easier to hit and (in my opinion) less frightening. Also, that emotionless voice Assaultrons have can send chills down almost anyones' spine.

What are your guys' thoughts?