Designing a kitchen of your dream is not a quick matter, it takes a lot of time, effort and knowledge.
Tell your designer everything you know and think about your future kitchen, and best of all bring him the pictures you like. The better the designer knows your wishes, the shorter is the path to the kitchen you want. Consider all the ideas, even if they do not match your original wishes. Also leave your comfort zone. It's worth it!
Purchasing a kitchen should be well thought out. After all, this is not a short-term decision you are to make. You probably know from your own experience that it is good to ask your friends and acquaintances for advice first.