hmmm walk along the canals, go to NEMO, go on a boat trip, have a drink at Nieuwmarkt, see the red light district, eat in chinatown and be there on 30 April!
Fondest memory: Well my winter memory of Amsterdam is the following horror scenario:
Around midnight on New Years Eve fire was set to whole boxes full of firecrackers. After an hour or two the streets were covered with the wrapping paper of them and everything was on fire!!!
Apart from that it was -25C that night so we couldn't really walk around much, it was too cold.