Pearl Strand Length

I couldn't decide between the 16 or 18 inch, so I went with a 17 inch pearl strand. I paid $1000 for AAA quality and 8.5-9mm pearls. I think the 18 inch is the classic length.
 
I think that 18" is a more mature length and will be very timeless in the long run. When I was younger I wore 16", and now I'm ready for 18" because it looks more appropriate with suits as well as jeans on the weekend. 17" like someone said above is also a great compromise.