Thank you for the feedback. You're not the first one to notice that the drumtrack doesn't have variation in the first 4 minutes. So that is something to keep in mind for the next track.
The funny thing is that I never went to a raveparty or anything, I also don't much listen to that kind of music. Except when it's on the radio in the billboards.
I just use the samples or VST which I think sound nice to use in my tracks. Sometimes the results are acceptable and sometimes it doesn't work at all.
And indeed, Rotterdam is a city worth visiting. With a totally other atmosphere compared to Amsterdam or Eindhoven.