I attended the AMOS conference on Maui, Hawaii, USA. AMOS' scope are primarily the technologies used to track objects in orbit, which obviously relates to Space Debris.
It was extremely interesting to attend the talks and learn many things I hadn't had any exposure to before. Besides I don't think I'd met that many people that do work relevant to mine ever before.
So, in general, all very good. Besides, just how great it is that the best, solely from the technical point of view, conference I could attend is on Maui?