"Honestly from my experience most girls are into the typical aggressive, somewhat douchey a-hole over nice guys. But to save face I think a lot of them say nice guy cause it seems like thats what society is trying to push nowadays.
What are your thoughts?"
The thing about the whole "nice guy" idiom is that if it is the only thing you base your whole personality on, then you are a pretty dull person. Thats not to say its a bad thing, but you need to expand outwards from simply being a "nice guy".
Women want something they can find themselves attracted to. A "nice guy" is literally a dime a dozen. You need to make yourself stand out from the "nice guy" crowd.
A "nice guy" who is a nice guy doesn't need to say anything regarding such. His actions speak for themselves. You need to speak about how you have a well-rounded personality (pet peeves, things that piss you off, etc), interests outside of the narrow topic of conversation you are having, but most importantly straight-forward and honest. Do not beat around the bush.