Not too bad, but all are on the mono side, hun. =/ The first two are pretty nice, but I say take out the text. The last one isn't one of my favorites. Try following some tutorials step by step to learn new techniques and information about flow and depth and all that. ^_^ You are improving though.
Second is probably best. As Eternal said, they are monotone so work with more colors. The text doesn't really work. You have a lot of potential, so keep working on em
