Hmm... Interesting. Sorta horrible a bit but not really that bad.
It seems like you've managed to mix in some advanced techniques (the coloring of the power bursts for example) in with some very raw techniques, (proportions and relative perspective of the boots). I don't know if it's coincidental or not, but this mix of advanced stuff and raw stuff is looking pretty appealing. It's almost a comprehensive art style of its own if you can manage to pull off similar advanced/raw mixes with a series of subjects.
In any case, it seems like you've got some interesting talent (stronger in color combinations and emotional framing) and there's stuff that can get better with training and practice (anatomical detailing, foreshortening and other 3d illusions).
Keep it up.
only thing I can ever use paint for is rough sketching with a mouse (doing quick strokes and cleaning it up with eraser), but I can do that in photoshop as well so...
The blasts of energy both look quite awesome, I'm definately a fan of those colors! The proportions might be a bit off, but it shows quite a bit of promise (Seriously, the depth of color in the flame is awesome, is that the spray-can tool? I want to try that on my next drawing! 
).
ya the fire particles and the ice particles are all spray can on the smallest setting
Well i made THIS in MS paint so be nice and tell me what you think.