Answered

You should avoid the overuse of exclamation points because you'll appear to be

Ashouting at the reader.
Bshowing off.
Cexhibiting bias.
Dcreating confusion

Verified Answer :

To be honest, all of those sound applicable. But since there isn't an all of the above answer, I'd say your best bet is either A or D. 

I would say A because not only can you sound exited by using them but in novels there also used when people are angry