If you pay attention to the tape, then how can you not like people supporting the bid?
5 mm's at the bid and 1 at the ask is a better indicator that that a stock will move up in price than if you have 1 MM at the bid and 4 at the ask, because (provided the 1 MM at the ask doesn't have an inexhaustible amount of shares and is just a retail trader) then the 5 retail guys at the bid will get tempted to give the 1 left at the ask a nudge, thus resulting in a rise of the ask price.