Hand 1 - Check flop - You want a cheap showdown...It's OK that your QQ lost this time.

Hand 2 - I fold

Hand 3 - I raise more pre-flop. I call flop also.

Hand 4 - Pre-flop I personally am lost in this situation. You have to put so much money in the pot to narrow down the field. After flop I play pretty much the same.