Yea, Blue Collar Man is Styx. They have lots of songs you'd probably recognize, but maybe didn't realise was them. They're a great band, and I just thought that your voice would fit thier stuff, but of course there's lots of other stuff I think you'd fit well with too.
As for sounding like Ozzy, if that was easy, Ozzy would be a janitor by now!
As instument players, we all sometimes forget just how hard it is for vocalists. For me on the bass, I can change styles, play with a pick, slap, hammer-on, etc, etc, to make myself sound like other players, but for singers, they only have one voice, and there's only so much they can do to sound like other people. Really, I think it's better to do what you did, and what oooaaar did with THe Tower, and just adapt the song to your own style, even if it changes the song's flavor a bit. There's nothing wrong with doing that, after all it's the musical diversity that makes it all interesting. We here at the IMG usually have strived to sound "just like the recording", but really that's just step one in this process, I think. Now that we have grown pretty good at making our recordings sound just like the original, it's probably a logical next step to stretch these songs, and make them our own, in our own ways. Otherwise, why not just listen to the original recordings? I think it's good for all of us to go ahead and feel free to inject our own personal styles and ideas into the songs we do, even if they are cover songs. That's what musicianship is all about, right? It's the freedom of expression that makes it fulfilling.
So anyway, don't worry about whether or not you sound just like Ozzy... you're not Ozzy, you're Mr Hyde, so go ahead and sound like Mr Hyde!
Like the other guys have said here, you have great timing and pitch and everything! GG!
