I've always sang to myself as far back as when I was very little when I used to sing along to cartoon theme songs (they had some good ->-bleeped-<- back in the 80s, I tell you). But going forward a bit there was a time I my life when I got hooked on Sailor Moon and while singing along to the theme song my brother asked me why I was singing like a girl. I smiled, but was like "uh-oh" I got caught, but still continued to sing like that (I can't even remember now of what I really sounded like then, probably hyper cutesy or something similarly exaggerated). But I used singing to help my talking voice (it took many years, and I'm still working on it), but that did not help my singing voice ("Please...oh god, please shut up!" This coming from someone being tortured having to hear me sing; my mom, she's done long gotten used to it). I also do a lot of cat meows all the time (dog now too, ever since my Snickers came into my life), and cartoon voices (silly pointless stuff for my own amusement, not voice training or anything like that, just for fun).
I don't like my normal voice much (sometimes I'm self-conscience about it), I sound female enough, certainly not like how I used to sound. And while I can get my voice deep (again for my own entertainment when quoting cartoons, movies, games) it sounds artificial like a girl trying to sound like a guy. I don't fully remember exactly what I used to sound like unless I watch an old family tape with me in it (its been some years since I had seen and heard my old self), and its just weird because not only does it make me cringe hearing and seeing me then, I sound like a different person.
Sometimes, because I do have really bad allergies, I tend to sound nasally much of the time and also always mucus running down my throat (post-nasal drip?) sometimes I get clogged up and have to hack it up because it'll cause my voice to crackle and try to get stuck sounding horsey. Also if I've been talking too much my throat gets tired and I have to clear it a lot, drink something and lessen down on the talking for a bit while my throat recovers. My voice is very bland (at least to me), nothing pretty or sing-songy, but then I've never been one to show excitement through talking since much of my life I tried so much to avoid talking to anyone except myself (there were times in my life all too often that I wished I'm lose my voice altogether just so I'd have an excuse not to speak). But whatever. If no one gets confused seeing and hearing me in person, or over the phone, I'm good.