Language and Grammar.

Hi! My name is Willie!!! I like exclamation points!!
SOME people think this unprofessional For example, when sending emails I like to put Thanks! or God Bless! at the end. But putting !! makes me seem like an obnoxious 15- year-old, apparently. (Oh wait.)
Not that there's anything wrong with periods, but which sounds friendlier:

Thanks!! or Thanks.

DING! DING! DING!
I would say the first one. But then again, I'm not that friendly.