General play is so poor at this limit that you want to build the pots as large as you can and you should never bluff expecting someone to fold. In most case such as hand #2, You should just keep pushing as more often then not you got the goods. I dont see how you could lay this down. And for hand #4, if you gonna go with this line (wich you shouldnt at 10NL) I would definitly follow up with a second barel 3/4 pot.

my 2 cents