I don't know, I've never been in a totally silent environment. Mostly I've lived in cities, and even out in the countryside there's always some ambient sounds - usually chainsaws and mowing machines these days.
But I imagine I'd like it. I already like it when the background noise is very low. It allows me to concentrate. Intermittent noises of most kinds tend to shatter my focus. Continuous noise of some kinds don't do that, and can often serve as masking for the more intrusive intermittent stuff. Some of them I like for their own sake - surf, rain, wind, birdsong (as long as it's not too loud), babbling brooks. When my son was very young and he couldn't sleep, I tried switching on a small hair drier with the heating elements off. It seemed to relax him, so I set up a time switch so it would turn off after he'd gone back to sleep.
I have something like tinnitus, but it's usually so quiet that I suspect it's just the normal noise floor of the human hearing system. When it's at its most noticeable at night I've sometimes felt uncomfortable about it - sometimes it's sounded like an old-fashioned computer loading data from a tape, and I've worried that it might become permanent, but it comes and goes, and hasn't got any worse or more frequent overall for years. Often I'm not sure if the noise I can hear is from the inside or from the environment. Right now I can hear what sounds like a quiet sine wave, and I don't know if it's my computer fan or my ears. I try not to worry about these things, usually successfully.