Courtie is so popular here ;D...

Nothing too much to add as there have already been some great responses, but:

Hand no. 1. I lead/block the river. Betting more on the turn is OK too.

No. 2. Lukie's post is spot on. One thing to note here is that AQo plays quite poorly in a multiway pot. Throw in OOP and it's much simpler to raise here, which might earn you the limped blinds anyways. At the very least, it should cut out the worst of the gutter clutter.

I'm raising AQo here the vast majority of the time.

No. 3 I would generally raise. Again, you might pick up the limps or blinds with a raise. If you tend to open raise/ follow w/cbet frequently, you may eventually get people playing back at you because you're FoS. When you flop a set of 8s against someone who thinks you're full of it... you get paid.

5 and 6 are preflop folds for me. Yes, suited aces are pretty, but it's very hard to draw OOP, esp in a raised pot.

I love Lukie's advice on #6 (with sandwiches and play hyperaggro) but I think a lot of it doesn't apply to 25NL. You'll often get called when you're putting it in with the worst of it.