Question about my singing voice?

No training, eh? I'm not a professional singer or anything, but I'd say It's quite good as is. Nice vibrato as well. Only criticism I have off the bat and that's that sometimes your intonation errs on the high side when you're singing the notes that are on the higher end of your range. If you get training, you should be able to fix this no problem; intonation is one of the easier things to correct vocally. (though I'm sure if you get a real, trained vocalist to respond to you, they'd have more to say/correct, because those people tend to find EVERY little detail they can in other vocalists that normal people don't really hear) but from my standpoint, for somebody with no training, it's pretty awesome.