Yeah, I hate to be unhelpful, but I am too much of a weirdo to pick any of the premades. I become anxious when I can't be a white knight in video games. I've probably played fallout 1 like, I dunno, ten times? And I always do the same stuff. Save everybody! GOTTA SAVE EVERYONE!
Try Invisible Inc. I bet you'll like it. There's a plot, but not the kind you get invested in. Try Invisible Inc.