
This one is a little bright, little too washed out. The colouring of the blue is really good, but I'm feeling that the magenta is a little too overpowering. Draws attention away from the blue, particular around her neck. Just tone down the lighting and the magenta, and you've got a really nice icon.

This one is really good on the bottom half, but the top feels too smothered by the texture and the blue/brown isn't working to compliment the purple hues. That said, the use of light orbs and the colouring on the bottom half is really top notch, so just some erasing of the texture around the top of the canvas will really bump up this icon!

This one is a little weaker than the other two. Firstly the textures don't feel positioned as well as the other ones: the lights on her hair are a bit distracting, and the texture down the bottom feels a bit messy and low quality. The stock positioning is pretty generic, but it works. The red colours are quite nice, but they are thrown off by the amount of contrast you have. Those blacks are too black and it makes the icon too dark.
This batch isn't as good as your others, but you said you just started using textures, and with that said, it is definitely a great start. Keep going with the textures, because they will give your icons more variety and make them more interesting. One thing though, try and play with less generic or expected stock positioning. It's hard to make a really unique icon, but the stock size and position pretty much dictates it, and you are playing very safe a lot of the time.
Anyway, keep it up, you've got really good balance in different styles and whatnot! :D