When you love Clubbing, and Techno, and Tech House (Panoramabar) and foremost a crowd that loves music, dancing, and go wild and crazy this is THE place to go to; But I guess you know already :)
Just before NYE we had someone with us who is into clubbing, but didn't find Berghain a special place, at first. A place with stupid rules, and similar bouncers as in any club, and didn't like the idea of many people being refused to enter. Then, the day after, he told us: Yeh, Berghain is indeed a very spacial place to be! I've heard this more often in last so many years :) I really like for you guys to get this experience, sooner than later!
BTW, more places in Berlin are no-photo inside, like Watergate, but that one is nothing really special as a club. Tresor basement is something to check out as well. Katerblau (Katerholzig now) is also a nice place, and in early mornings people can go crazy, jumping and dancing their ass off :)
Tresor, Griessmuehle, Berghain and ://About Blank are the spots which we would like to check. especially the last one seems to be a something new and very interesting (at least for us)
I added ://About Blank and Griessmuehle to my list of places to check out! Heard about the later, but never been.