I won't lie, I don't know much about photography, but I do know what I like in terms of general framing and composition, so I'll give my two cents either way...
Here's the ones I like: 3, 5, 8, 13, 21, 24, 25
Now in terms of photography lingo and techy stuff, I honestly can't get very deep into why I like these pictures apart from the rest. I guess they just appeal to me more. What I do see in them, however, that I don't see in others is a representation how the kitchen works. Its a moment in time that seems to fit perfectly in with the atmosphere you are trying to capture.
Take 3 for example. You have lots going on, and its a generally busy photo, but in the center of it all is that small plate that's being assembled piece by piece. It is the star of the show and the chef's main focus, and you represent that well with both your lighting, framing, and depth of field. I think this was my favorite one.
You can see things like this in most of the ones I listed above (I think - I'm not going to go check each or go over each...). However you can see that in others that presence is not there. Take 1 for example. In this photo, you can see the chef, his concentration, and a little bit of the busy atmosphere (by the pieces of other people on the shot), but you cannot see what he is doing nor can you get a feel for the overall feeling. This shot doesn't do anything for me.
Contrast this with 8. In 8, you have good depth of field, and the vig/spotlight effect gives it a sense of focus, which is reflected through your subject. Your subject is concentrating on his work, and your picture captures that.
Basically, what I like to see is a representation of what is going on in the kitchen. If you can, through your photos, reflect the atmosphere of the kitchen, whether it be hustle bustle or slow and precise, then you've been successful.