Usability is Not a Verb
Do yourself a favour and read Usability is Not a Verb by Scott Berkun. To quote:
Who has the most control over how well a thing is made? That’s really what all of us want: well made things. The answer to the question is always either:
A) People who do the making, or
B) People in charge of the makers.
For all their progress, most usability/design folks are still neither A nor B. Instead most are
C) people who try to convince A or B to make things in a certain way.
No matter how talented you are, if you are a C, your talents will often be watered down by A and B. If you want more power, there’s only a limited amount A and B will be able to grant, no matter how much they need and respect you.