Critique my peach (Mistgun)

[Phantom1987]

Hi, my gamer tag is Mistgun and I'm a chilean peach player. I want to improve, and my biggest problem right now is the lack of experience and theorical knowledge. So I wanted to ask you guys to help me find my mistakes and give me some ways to fix them. For this I would like 2 things:
1-a critique of my general style (what to do, and what not to do)
2- a Critique of the way I played the MU (what to do and what not to do..)

Here are some videos of me playing my hardest MUs:

- Vs Captain falcon
http://www.youtube.com/watch?v=bQSDHGXylG8

-Vs Falco:
http://www.youtube.com/watch?v=C1ACs2soiQ8

-Vs Marth:
http://youtu.be/nz5RFg-5dwg?t=11m

-Vs Sheik
“here is where I’d put a video of a match against a sheik player... IF I HAD ONE!”-

Thanks a lot beforehand for the Help. =)

Pd: I know there's a MU thread and a critique thread, but I wanted a personal MU/gamplay critique =) ..