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Very friendly, often obnoxiously or disingenuously so. I don't think George is as nice as he seems—he just strikes me as hail-fellow-well-met.
Fig. friendly to everyone; falsely friendly to everyone. (Usually said of males.) Yes, he's friendly, sort of hale-fellow-well-met. He's not a very sincere person. Hail-fellow-well-met—you know the type. What a pain he is. Good old Mr. Hail-fellow-well-met. What a phony!
hail-fellow-well-metshowing excessive familiarity.
1979 Steven Levenkron The Best Little Girl in the World Harold was accustomed to hail-fellow-well-met salesmen and deferential secretaries and even irate accountants.