#2
It really depends on what you're going for. Where you're at with your singing, it's nice sounding, in an acoustic indie sort of way, but it isn't powerful. It fits with what you're doing there (though the guitar could use a little work, most notably on I'll Be) but if you want to apply your singing to a rock context, you're gonna need to learn how to project your voice more and get some good resonance. But really, you're miles ahead of the game if you're a beginner. You can sing on pitch, and you don't have a ridiculous tone to your voice, so I'd say that's a pretty decent start.
#3
I REALLY like your voice. Almost like Elliott Smith, but not as reserved. The guitar needs more work than the vocals, but thats not the point.

Great job.