Wow!!, Thanks for the comments guys!!!!! I'm glad that the animation likes you
Dingo and Robcat are right, the arms (hands,elbows, and shoulders), are my "weak point". When I acted this animation (yes,yes, I acted it ) I don't know what to do with my own arms, and that's the reason why the arms in my animations are so stiffy....
About how long I take to make this animation, is relative. I think that 3 weeks or a month, because I rigged the model with the 2001 skeleton, and add some bones to control some parts better, and then I began to animate, but one week later, I noticed that the animation was so boring and monotone than then I decide to start again, and spent one week more.
Always in my spare time, one-two hours for day.
Thanks again for the response