I mostly backpack solo. I like to hear the night sounds, but I understand that they may bother some people, especially at first. Without getting into whether this is a good thing, or whether someone is depriving his/herself using earplugs, I'd like to point out one very crucial thing about earplugs which may not be apparent to people considering it casually - earplugs don't exactly eliminate the unidentifiable sounds that bother people.
I mean they do, but I suspect that people imagine this something like magically editing out sounds that may cause you "distress", wake you up, etc. What you get that replaces these sounds is, to my ear, an unnatural silence - all the white noise, the wind, water noise if there is any nearby, and so on goes away. The second I put in earplugs I instantly feel MORE anxiety-ridden, exactly like being blindfolded. This is because my situational awareness goes way down. So the silence in effect replaces the sound of the bear walking by once during the night, with the silence that might yet contain a bear walking by at EVERY point in time during the whole night. LOL
So NO, I can't stand them. When I put them in I instantly want them out if they are doing their job at all well. I sleep with my window open 8 months of the year, and like to hear the animal and other sounds, most of which I can identify at this point. It is possible that this is a kind of conditioning that makes me feel very uncomfortable with silence - I have heard people from big cities can't sleep in the country since they need to hear the sirens and people talking on the street, etc. So this may be a similar effect.
On the other hand, near total silence should make anyone more anxiety ridden unless they have drugged themselves into a stupor. My advice, if you want to learn the very different lessons you get from going solo - what Edward Abbey called "a hard and brutal mysticism" - is to embrace the anxiety for a while and see if you can learn something about yourself from it. Most of it - the pointless part at least - should go away by itself after a while.