The few times I've dealt with code that does some (even just very basic) algebraic manipulation, I found the lack of operator overloading to be _really_ awkward (look no further the math/big library). For this reason there are many types of mathematical code that I would never consider writing in Go. But outside of those domains, I haven't really missed operator overloads at all.

Well, I guess the lack of an overload for <, >, and == is somewhat annoying. But I don't think those as are essential as arithmetic overloads are for mathematical code.