Can only speak for Tamiya's acrylics -- pretty much the only version I've used for nearly two decades -- but they have no particular smell that I can actually call to mind, so must be pretty minimal odor-wise.
In fact, the primary reason at the time for switching to them (from enamels) was that I was living in an apartment at the time, and figured the neighbors wouldn't appreciate the reek of thinner every time I airbrushed.
With the acrylics, I've always used Tamiya's own X-20A thinner...which has a slight alcohol whiff to it...but never had a single mention, inquiry or complaint with any Tamiya product.
Cheers