Hand 1 he probably has a middle pocket pair so it doesn't matter what you do.

Hand 5 I'd fold if he raised, result is fine.

Hand 6 is where betting smaller (like you did) is good because of the 3bet pre. It's less likely he's on a flush draw, and the flop didn't likely hit him hard.

Hand 7 is one where I might check the flop since it's so dry and raggy

Sometimes it comes down to villains. If they're passive just bet because they're not going to raise you and it's hard to get the stack in if you give up one street. If you know a player is aggressive then you could consider c/r or something, but even then it doesn't always matter.

Keep an eye on your tables. If they're getting nitty post-flop then either you need to adjust your game or find a new table. If just you want to get paid on your good hands then it helps to have either passive stations, or agro donks at your table.