Hand 4 - The pot is ~$8.5 on the turn. Your $3 raise will not get the villain to fold anything. Make it at least $5 or just call.

On the river the pot is $15. Why does everyone say bet $5? Why not bet $10? You think 25NL players will fold TT/JJ when faced with calling $10 into a $25 pot? This min-raise pre-flop, check flop, almost min-bet turn looks like AA/KK if villain is a retard.