I repacked my front hub for the first time a couple of days ago. Everything went pretty smooth but when I spin the wheel fast (while lifting it to my ear) I hear the bearings “clicking” or rolling together. I believe everything was very clean. Is this normal or:

1. Did I not put enough grease in them?
2. Is my cup cone adjustment off?
3. Are the bearings not clean enough?
4. Any other ideas?