I liked Tacheles. It showed what people could achieve together with very little support. True grassroots initiative.
Indeed, it had a certain charm about the whole place. What was interesting for me was that most of the artists were actually friendly and approachable - they didn't seem to have that sulky attitude that other places have.
The original one, Köpi, is still going, however it's less welcoming to visitors.
This is what I dislike about most squats - they claim to be open minded, but most of them are very closed minded in their mentality. It's what I loved most about Tacheles - they weren't pretending that they were doing anything other than squatting and selling their art. They were also very keen on simply being left alone - they weren't getting involved with all the childish politics that tends to occur in such places.
For me, it was a great shame that for all the money spent in Eastern Germany, money couldn't be found to keep Tacheles as it was. It was an oddity in a very odd city, and should have been preserved.