Considering you didn't have the absolute best resource in the world for painting a helmet (The Reference CD) you did a fine job.
Honest. 
But I've only painted approximately 90% of a helmet, so I'm not exactly an expert.
The RF (range finder) ear should be dull gold; the other ear should be a sort of lime colour green.
One area for improvement is the scratch over the left eye (right if you were wearing it.) It gives Fett a lot of...I dunno. Personality, I guess. You could give that more detail.
The back should be a darker, bluer color. It needs a LOT more damage.
But like I said, you did a fine job. If you want to do better, check this out:
http://bobafettcdref.cjb.net
There's some great shots of the ESB helmet in there.
And welcome to your new home. 
Cheers!
TJ