you have a lot of excessive mouth/tongue movement which distorts your vowels. It would be reminiscent of what you hear in punk/pop songs. Try landing cleaner on the note instead of doing so much sliding to and from notes. If you hit your consonants harder, this will help the issue.
Nice stuff man, I remember seeing some of you previous videos I like it, but I agree with cgilli in that you should probably try to reduce the excessive mouth movement... but you have a good voice, plenty of potential for a KILLER voice

Please could you check out my christmas cover?
Thanks for the comments guys, and I'll see if I can fix my excessive mouth movement problem lol I never really noticed it before, it's just how I sing