I have a 84FS and like it a lot. Mine had been originally bought by a friend for his wife. However, she had trouble racking the slide and never shot it. It sat in his safe for quite a few years until I got it from him in NIB condition.
I readily admit that I have no practical use for it what-so-ever. I have much smaller .380s for carry. But it is a classic and as someone pointed out earlier, there is a certain pride in ownership that goes with it. It feels good in my hand, shoots great and just reeks of "class". What other reason do you need?