I think these all really depend on what level villain is on and think you are on.

hand 1 - I like the check here, since it's super drawy and you'll likely get bombed a lot. I think villain can show up with anything on this river, thinking you decided to give up on a wet board. Enough air to call river.

hand 2 - I would bet this flop to merge my range and potentially take him off better hands on later streets (99-JJ type stuff). I would also bet because people love bluff raising dry A/K high boards like this, and I'd be reasonably happy getting it in vs some ppl. River is tough and Q sucks pretty hard. Confusing spot since I'd expect ppl to value bet 99-JJ on the river but I'm not sure if they do on this Q now.

hand 3 - I think I like a turn bet here as board is getting a little ridiculous. I can't imagine villain not leading any reasonably hand (that beats us) on the turn to protect. I probably call here.