City Hall Memo; Bloomberg, With Year Inside, Shows What Outsiders Can Do
New York City Mayor Michael Bloomberg, billionaire entrepreneur with no government experience or clear political support base, says his first year in office has been absolute success, City Hall interview; experts say that Bloomberg, lacking political baggage, has shaken up the way business is done in City Hall; critics complain that Bloomberg, whose management style is far different from his three predecessors, is remote from larger workings of goverment and appears insensitive to New Yorkers' daily lives; supporters note he allows his aides close and frequent access, seeks out and encourages the most qualified aides and gives commissioners latitude to do their work; photo (M)