I really dislike these cutesy google-style error messages à la "oops something went wrong" and "Aw, snap ..." - Often, their information value is zero: they don't explain to you how to solve the problem or what went wrong (maybe with the exception of the frozen error message). When you are frustrated because something isn't working these messages can get on your nerves fast.

It's great if you can package the information in a funny way, but if you can't I'd take function over form any time.