Love Bill Hemmer- he's smart, informed- and just fun to watch.
Dana Perino... well, she's nice, pretty... nice... apparently bright, little on dull side. Nice.
She does much much better when she is part of group (ie. The Five) and has a foil, like Greg Gutfeld, to play off of and make her entertaining. Because she's just really ...not entertaining. She's, well, just nice.
She just is minus the verve, energy, and enthusiasm that Hemmer, and Smith, and MacCallum have that makes them watchable in virtually any time slot.