I don't think that there is anything wrong with safe. Especially if your customer has hired you based on his/her liking of the work you have produced in the "safe zone". You don't want to do a whole shoot in the "danger zone" (cue Top Gun soundtrack) when your client likes what you normally produce.
However, its ok to mix it up with a few shots to
a) be creative,
b) expand your style
c) possibly impress the heck out of a client who wasn't expecting it.