I've had a low grade (although who knows, it's not like I can hear someone else's tinnitus to compare) tinnitus for as long as I remember. For my childhood I thought it was just normal to hear this noise when there was no external source of other sound. Honestly, I never felt particularly negative about it. I guess if you never know what true silence sounds like, you never know what you are missing.
My daughter has it, too. My wife doesn't, but my daughter has described it to me.
I haven't felt negative about it except for the time I visited an anechoic chamber exhibit at a local museum (COSI in Columbus, OH) in my early 40s. It really messed with my perception and the tinnitus was much louder than normal for days after. Even thinking about it makes me edgy.