Honestly? Ok, well you have good tone - you can hold a tune without losing the pitch and you have a soft voice with a hint of vibrato occasionally. As has already been mentioned, you sound as though you are almost afraid to sing up - listening to Layla, you need to vary your volume throughout in order to deliver that song in the manner it ought be done. You say your full voice isn't pleasant but what's probably more the case is perhaps you may think you lack the control necessary to belt without losing the tone/pitch. This is something you can work on no problem with some practice.
Enunciate - work on your diction (which may not be an issue if you are singing at your regular volume; it's just with a quieter sound it can be harder for the listener to understand what you are singing).
You have a good voice, IMO, and whilst I'm no Simon Cowell (my trousers don't go as high) I've heard A LOT of people sing and what you have sounds good - busking wise you could manage it with two additions - more volume and good acoustics like a subway or tunnel. If you kept a quieter voice then you need to think about doing something like a pub or somewhere with some amplification.
You keep in tune, you sound good - just be a little bolder and allow your voice to direct you towards those songs which bring out the best in it. I liked it
