Hand 1: unless he's a calling station, I don't see the point. You're only getting called by the flush there really. I'd reraise him more on the flop and if he calls hope I don't have to put in any more money..

Hand 2: same thing.. why overbet the pot here? Either he is slowplaying and you just nailed yourself, or he's not gonna call that if he got nothing. Bet in a way that makes weaker hands call too.

Hand 3: meh, I used to overanalyse like you do there, but really.. you just don't know. Just play a consistent game. Put in $4 on the turn so a worse hand will call. Or overbet the pot if you want to gamble that he'll donk call it, assuming it's a stupid bluff. And really, checking there is stupid. First you reraise then you want to slowplay? Doesn't work. Even if he folded as you bet, doesn't mean you made a mistake.. if he realizes he is beat, there is no way to extract value anymore. Oh yeah and there really is no "read" excuse for a minbet in this situation imho.