In fact, this is my 10th anniversary at this congress, i.e. the first one I visited was 15C3. I ended up at 15C3 as somewhat of a coincidence by just following a fellow Linux hacker from the Linux User Group Nuernberg to whom I've since lost all contact.
What's actually worth mentioning is that this is the first CCC congress that I visit as a pure guest. I have no lecture, and I am not actively involved with any of the things I have been involved before, such as the video recording/streaming team or the Sputnik RFID location system.
Interestingly, I felt the first day much more tiring than usually, despite having slept more than in any of the previous years. Apparently the lack of constant adrenaline caused by last-minute-problem-solving has its impact..
The congress is a lot of fun, I've been talking to many old friends, colleagues and fellow hackers from all over the world, involved in all of the projects and/or companies that I've remotely had any contact throughout that ten year time period.
It's a very nice feeling. I doubt there is any other event or occasion where I would feel more at home than at this annual congress. This is my culture. This is where I belong. Here are people who understand, or rather: understood.