I like the "slightly needy folk" comment. Nice and non specific yes very good..
Anyhoo I have been to Amsterdam several times, sampled the space cakes and other herbal delights and its good fun on an occasional basis, not something that has resulted in me getting addicted or relying on it to get through everyday life. If you do decide to do it, just try a little bit. You will probably get the giggles and feel all light and fluffy. By the following morning you will feel normal again it only lasts a few hours.
Amsterdam is beautiful, lots to see and do, the museums are lovely, canal trip is romantic, good wax museum, Anne Franks is a must see, and wandering through the red light district is fun too. Best cafe is called Babas does great hot chocolate and tasty space cakes. Have a lovely time Amsterdam is a fantastic city