Turkish Delight

The Turks are the largest ethnic minority in Berlin and without them, midnight snacks would be far harder to come by. Plus you know, we love the ethnics. The two Bezirks of Kreuzberg and Neukölln have a thriving Turkish population and thus, plenty of fucking awesome grub. While döner immediately springs to mind, the Turkish/Middle Eastern cuisine does in fact extend beyond this: falafel, shawarma, baklava to name but a few.
In order to avoid a disappointing döner experience where the meat makes up two thirds of the portion and the grease the other third (although this is actually England's speciliaty, far harder to find over here) or something similar, we've come up with a list the best of best of Turkish food in Berlin.

Mustafa's

Warthestrasse, Neukölln. U8/S41/S42: Hermannstrasse
Mehringdamm, Kreuzberg. U7/U6: Mehringdamm (right next to the UBahn station)
Opening hours: daily noon til late

Look, this place has a Facebook group devoted to it ("if there's no mustafa in heaven, i'd rather go to hell.") so you know it's made it. Don't let the measly member numbers (28) put you off- this is an underground gem so you better get in on it before all the cool kids do.
Reasons Mustafa's döners are the best:
1. The vegetables are amazing, not your typical döner veg: courgettes, peppers, potatoes, carrots etc.
2. The meat used is chicken. Don't know about you, but I fucking love a bit of chicken.
3. Feta cheese spinkled on top for the final touch.
4. Well cheap. 2 Euro 50 last time I went.

Tigris

Simon-Dach-Strasse 11, Friedrichshain. U1/SBahn: Warschauer Strasse
Opening hours: daily 11am-2am

Yummy falafel and shawarma but best of all are the hommus wraps. Comfy cushions too, always important. You can also sit outside in the summer.

Habibi's

Akazienstrasse, Schöneberg. U7: Eisenacherstrasse
Goltzstrasse 24, Schöneberg. U7: Eisenacherstrasse
Körtestrasse, Kreuzberg. U7: Südstern
Oranienstrasse 30, Kreuzberg. U8/U1: Kottbusser Tor
Opening hours: daily 10am-2am

Pretty fit falafels, as well as other Middle Eastern fare. Something that has to be tried: the pistachio balls aka little, green ball things.