Shaking your frames, are they silent?

When I shake my frames, the wheels make a soft "clickin" noise, when I grab a wheel, they have very little play. It's the same with my rockin 4x100 and with my Roka 100/80. Is that normal?

The thing is, the two frames from two different brands, that have different bearings (good quality), the original spacers (also tried others, bigger spacers and smaller ones), good wheels (fr Urban Speed, fr street kings) are both having this slight play. But I don't know if we can call that "play". It's not affecting any performance, it's just there and I wonder if your also do that or if I have some weird problem which I don't understand. Cause it doesn't make sense coming from two different brands.

Guess it's just a normal thing?