If you're going in or coming up to their summer I'd say stay away from NL. Everyone is really cool and people are relatively friendly but at that time of year it's absolutely packed with foreign kids getting stoned and the Dutch just see you as another tourist (with a few exceptions of course). I spent a November there though and that was far better than the summer I had there on a separate occasion, people were more open and looking for a chat than at summer. But maybe stupid foreign kids getting high is your thing, they do get pretty loose. Weed is still legal for tourists in Amsterdam but not outside. Plus in summer you'll spend 1/3 of your time in line (usually behind old people who don't know what they're doing).
Having only spent a week in Paris I'd say go there, you'll have to learn some new language and there is just a different vibe. It's Paris and will always be Paris and fuck off if you don't like it. Amsterdam will be whatever you want it if you spend some money and stop trying to speak Dutch.
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