is this your first animation? great job at analyzing a good animation and making it your own.
if you want to make it stronger, have a little more buildup at the beggining BEFORE he makes the kick. Right now it looks a bit too much like he's dancing, doing acrobatic movement instead of putting enough force into his movments to hurt his enemy.
http://www.zweifuss.ca/colorswap.php?pcolorstring=RemyPalette.bin&pcolornum=0&pname=remy/remy-hk.gif this is what you referenced right?
part of the problem is Remy is hitting sideways while you're almost going straight up, your kick is more like a ChunLi kick than a Remy kick ( a kicking specialist kick, not that she literally has this kick). You need more buildup than the original animation (you have less).
just have the first few poses go from relaxed to tense before he makes the kick, and have them ramp up in speed into the kick, go from moving very little to moving more and more until he actually makes the kick, at that point there should be a big jump in speed, his leg should have moved a lot in the frame in which the kick actually starts. Remy is indeed a good referrence, look at his first poses to see what you should do, but if you can exagerate it because the movement you're making is actually harder than what he's doing
also, if you could tilt his torso towards us a bit it would help sell the kick, stretching your leg that high is very hard
http://www.zweifuss.ca/colorswap.php?pcolorstring=Chun-liPalette.bin&pcolornum=0&pname=chun-li/chun-li-mk.gif check out how they built up the kick in this ChunLi kick that goes as high as yours, she makes a little jump before doing the kick because she needs that much impulse. Not that you should exactly copy it since she builds up so much she actually kicks backwards, but it should give you an idea, your buildup should be somewhere between remy's and chun li's.
also, why does he duck when he's done? he can perfectly land on his feet with the impulse he's got...ducking like that doesnt seem like something you'd want to do in a fight if you could help it. Specially because he's kneeling like that, it seems that if he were to duck at all, the legs should be in the opposite position, right leg kneeling and left leg bent in front of him...that's a really weird way to land after a kick.
also, if at all possible reference real fighters too
EDIT: found a kick that is pretty much exactly the same.
http://hiphotos.baidu.com/272883992/pic/item/f165f31ffa440b37314e1500.jpghttp://www.fightersgeneration.com/nx9/char/cvs2/godrugal/godrugal-cvs2-dodgekick.gif (mirror, I was told the other one isnt online)
Rugal seems like a good refference for you, check him in other games at emugif.com or fightersgeneration.com if you want