I liked blowing in the wind, but you seem to go out of your range a lot when you get to the lower notes of the song. I'd suggest singing something a little higher. Also... when you sing where do you feel the sound vibrating? I'm not experienced with technique (as well you know :P) but it at some points it sounds like it's coming out of your nose rather than your mouth. I'm not really one to talk because I can be
so nasal at times, but the way I don't is I take a big deep breath and open my mouth wider when I sing. It might be the wrong way of doing it it might be the right way. I did really like it, and btw I don't think you sing as though you're performing opera, you just have a nice natural vibrato in your voice - which to me is lovely to listen to. Your voice has a really nice texture to it as well.
Also, I really did like blowing in the wind, I'm just saying negative things as well as positive because you said it was okay.
EDIT: btw I updated my thread, and it'd be cool if you could cast your eye over it.