Victor, first welcome to the forums. Everyone has and is entitled to their opinions. Your opinion is just as valid as others. However, there are ways to go about things that are less confrontational. To just come out and say "I don't like that" (especially on a knife as nice as this) isn't constructive. It's kind of like punching someone in the face without a cause. A better way to go about things is how stevewest did it. Point out the positives before laying out what you feel could be the negatives (or even just your default opinion if there are no negatives). That's just a principle of leadership and a common courtesy.
Now if this was Dan's second ever knife and there were tons of grossly visible mistakes, that's an opportunity to lay out constructive criticism in order to help Dan improve. However, Dan's been doing this a long time and his work is that of a master-level smith with superior fit and finish, material selection, design, and execution. There's nothing wrong with the knife Dan posted, so it's just your opinion on the ring guard (it's not a hook). Honesty is appreciated and valued here, but try and deliver it with tact.
I really don't know why I am even typing out this response....
--nathan