Gophercon is a social event and the very nice organization made the experience very enjoyable.
Still, this is a tech event and the program is usually packed with great talks that are influential for the Go community for the coming year. Last year talk on Go 2 shaped the discussions of the community during the past year.
I have attended many great talks as well this year. As it is a multitrack conference, I could not see them all and I will have to catch up on video. That said, here is a quick overview of the one I found inspiring, elegant or thoughts-provoking.
Note: I will next focus on the two main conference days, but there is a lot more at GopherCon, from pre-conference workshops to the more informal community day, with lightning talks and hacking sessions with peers.