Happy birthday and that necklace is awesome.
The necklace is too bling for daily wear in my life but I do not know what your daily life is like and whether you need to care about what others think. I voted no on the principle that wearing beautiful jewelry should be the default.
This is totally not meant to be a judgmental question — Which do you value more, being the observer or the observed? Because with a diamond choker or even at the slightly longer length, you will be surrounded by fifteen carats that you rarely see. If I had a choice between that necklace versus whatever ring or bracelet or pendant on a long chain that the money could buy, I would choose the bling that rests in my line of vision.