Sounds great and I like Sovereign's description--that's essentially how I have seen it. Also take into account that the Nomads are inexperienced with emotions of the human passion sort.
Its like seeing colors you never saw before--some are garish, sickening or disquieting but others could be intriguing, pleasant and even seductive. All these things would be "noise always in your head"--like tinitis--even if you concentrated to keep them out of the foreground.
And if the Wild host has to sleep, perchance what dreams would be had and what affect would they cause?
If you look at my "Boeser Verraeter" story, I set a scenario where it is in Nomad-Wild interest to mimic humanity through a Wild as realistically as possible. I paint a picture of the stress it might be like. Boeser's role is akin to an FBI profiler working on a serial killer case. He has to get "into the mind" of his host. Its so stressful in real life, that FBI agents are not allowed top actively profile and pursue such cases for more than a year and then are given leave time with psychological counseling after.
I see this as a one degree of the state a Wild can find himself in.
Not asking for "pure mechanics" either--that's taking my words to an extreme--LOGICAL and CONSISTENT and PLAYABLE is what I am after
--not so esoteric that all I can do is mumble incomprehensible thoughts (though that is fun too).