These seem alright. The first one is pretty good, but the effects are over welming the Stock. The second I don't really like. ._. It's effects and text over take the main Stock. Floating heads arn't very attractive.
Needs work in every aspect. The effects are too clumped together and need a sense of direction. The composition's choppy, and the stock choices /quality wise/ should be better. The tags lack depth and the color choices should range into different color palettes. The typography is predictable and I'd encourage to play with other font families rather than the traditional 'handwriting' style. The inner/outer glow also doesn't add to it. The light sources should be based in one direction. Focals need work.