With the racquets where I have listed none as my dislikes, it is because the racquet has felt great in stock form and I felt no need for any changes. Those are all racquets I could use and play well with, and would feel confident taking into a tournament. But in the end we have to choose one (ok, maybe two) and right now I'm really enjoying the C10 Pro and the Head Prestige MP. Again, I'm happy playing with either. I don't think my level improves or drops between them, it is just the feel of the interaction between the player and ball changes.
Hope that helps.