I really like this city and it was great to come to after traveling through a near 3rd world country. I guess it's like Vegas you can find what you want... very naughty or very nice. I find the Dutch pretty laid back. Great museums. Food is good in town, and if you're a veggie vegan type there's lots of restaurants to help you. All the naughty stuff I found to be mostly a bunch of visitors. The locals don't seem to be the type to get into that.
Insider Tip:If the line is too long, I'd say skip it and find something else to do, there's plenty. I didn't do this myself, but leave Amsterdam and go to another city in the Netherlands. Don't take the water taxi.