That is half way to 2 years old.
I don't know what to say about that so for now I'll say nothing. :)
For us, 18 months has brought with is toddler behavior. Although Nora really is a very cheerful and fun child, she has definitely begun expressing frustration when she has to do something she doesn't want to do, like getting her diaper changed or putting on her coat. Although I don't like seeing Nora get so upset and although it takes a lot of patience and effort to get out of the house and settled in the car at times, we just keep changing diapers and putting on coats and getting buckled into car seats and dealing with tears.
It's not all a fight for toddler independence though!
Nora's sense of humor is blossoming and it is so fun to watch and hear her laugh at something that she finds funny. These days, Jeff and I will do anything, no matter how goofy, to get that giggle going.
She is also starting being able to climb on chairs and stools more independently. This is both exciting and terrifying. For Christmas, we got Nora her very own arm chair. Not only does she like to climb all over it, she also turns it into a bit of a fort. When it's time to play this way, Nora tips her chair over and yells, "IN!" Below Daddy is "in" with Nora and they are spelling out her name, which is embroidered on her her chair.
So the consensus on 18 months is that it is exciting, exhausting, and exhilarating.