Ameteur singer low in confidence wanting advice

Hello people of the interweb.
I'm George a shred guitarist turned (or turning) singer songwriter.
My singing technique isn't desirable but here's a video of a couple of my songs showing what I can and can't do.

http://www.youtube.com/watch?v=epE87as4S74&list=UUCb9H8OacCXSuJd9LZRoz9A

I'm looking for compliments only...
Just kidding...
I would love to get some advice from someone who's had vocal coaching and can diagnose my biggest flaws. Anything like technique, pronunciation or breathing... or songwriting.

Thanks you xx