Listened to your mix, and I really don't know what sort of DJ you're trying to be. But in the eyes of a DJ that does DNB, Dubstep, Hardcore/Gabber, Hardstyle, and Electro House... it was a very slow start for a mix.
I mean it's not an awful start, but if you're not planning on being a wedding DJ, you need a faster more energetic start. People love energy, seamless transfers, and a few crowd pleasers here and there. Like using samples from popular songs (no you can't get in trouble for sample usage DJ'ing live.)
Overall the transfers I've heard aren't that bad, but slow starts always make it a bad mix (in my opinion.) Now keep in mind you want the crowd to be dancing and getting into the music, not sitting on a couch crying and telling others their emotions and tearing up. Also don't randomly brake in the song, or mess with it too much that changes the overall pitch of it. Though crowds like it, I personally hate it, if I hear a track I like being messed with like that it just overall annoys me.
Word of advice, if a concert it themed for a genre, you don't have to be one dimensional, experiment with shit that's relatively the same BPM and style of the genre, then you can get props for being more original than other DJ's.
Also don't focus on the crowd too much, keep yourself busy, prepare yourself ahead of time.
One more thing, DJ babble is annoying as fuck. Though the kiddies like it, if you're planning on getting big (Netherlands big,) you'll want to let the music speak for you. Keep in mind the crowd may still like interactivity, but be reasonable about what you do.
If you want my personal opinions on the tracks
1st Track - Didn't prefer it, I don't really like intro's where females have to sing through 3/4ths of the song. Never did never will, just my preference though.
2nd Track - Not bad... but it's not incredibly interesting, good way to get the crowd into music like this? Boost the bass on the EQ, add your own effects, use a beatgrid, or a kaosscillator / kaoss pad and make that track your own!
3rd - Good Dubstep track, very basic dubstep track, but good. That honestly should've been your start.
4th - Not a bad DNB track, has groove, has bass. Interesting overall.
5th - Loved the track, more DNB greatness.
6th - Great dubstep track, no issues with it.
I gotta say the mix progressed and got a lot better as it went along, you have potential. You're already very decent and I suggest you don't give up on this hobby, could earn you some money someday!
Good luck in your venture FKWAJ, hope to see you on stage sometime!