I been using Go for a year now. Its hard to explain but for the most part I enjoy coding with Go. I could say i find it fun/enjoyable but that doesn't seem to convey the right feeling.
Like many well designed and well engineered things, I think familiarity and time cause that satisfying feeling to blend into the background and become the norm. You only realize the difference again when you have cause to use some other tool laying around (I just need to pound this nail I will just grab this random hammer laying here) and it "feels" different -- the weight is wrong or the grip is weird.
I by no means claim Go is perfect, but it seems to a great match for the kinds of things I tend to work on, and it "fits in my hand" rather well these days.