Don't center your focals. It makes the composition boring. Also, try to use more than one color in your tags. I like the smudging in the first. The effects are quite nice, as is the text. Same can be said for the second. The third... most of the effects seem to be covered by the stock, so it really just looks like a centered stock with some scanlines and dragon stocks on the side. It's minimalist (which is not a bad thing), but it needs better composition/colors to make up for the lack of "wow" factor/effects.
yes, indeed. the first thing you learn in college is not to center the focal point. other than that, its obvious you are just starting. Everything takes time to get better at. practice makes perfect. Try fooling around with photoshop. This will give you practice.
I like the first one. Nice blending and effects. The second on has nice flow. It would be better if you tags were not monotones though. The third seems beginner-ish. Good Stuff though ^^