cool ;o)

hehe, there is no rules to get a fantastic shot ;o) If it's not focused, but you are experimenting your creativity, why not ?
I think if you know what you are doing, and you have a way to go... why not ? If you think you are knowing enough technique to unleash your creativity... go ahead and try !! :oD

With digital, we have the possibility to try and try again ! ;o)

So, no, focusing is not important -> if you know what you are doing of course !