Thanks everyone for being so helpful. I'm trying hard to understand all of this but it's a lot of new information. Let me just point out how handicapped my knowledge about the basics of music is since I knew NOTHING about it before I picked up guitar playing. Atleast now I know that there are different scale patterns for the same major scale but they don't sound the same to me at all so I'd lie if I said that I understood why this is. But hopefully I will keep it in mind and understand it eventually. I also have trouble understanding what a root note is. It's a note that a pattern end and start on like you said like Si's example with the C major scale. All the root notes were C notes but it's the same thing here. I don't hear the same note at all when I play them, and I don't even know what an octave is...
My knowledge about music is so bad that I feel ashamed to ask these questions.