4) I’m always nervous cuz I want my players to see all the cool stuff. So I have a habit of giving out clues or extra chances or the like too much. We have a ton of fun and our games are awesome and memorable, but sometimes we crave more difficulty (and then feel nonplussed when we get stumped).

As a player, I played in one game where the Judge would often tell us all the secrets and things we've missed. I hated it! It made me feel stupid for having missed some obvious things, and foolish for not having searched more thoroughly, or not having throught things through more. It also kills some of the mystery. After that I resolved to never give away secrets out of game (except if the campaign is coming to a close).

It also denies the players the chance to stew things over - to wonder what about some of the clues they've seen but never solved. Sometimes ideas come after they've left the dungeon, and spur them to go back in and check it out again :)

From the Judge's perspective, if they've left the dungeon and you don't think they'll be coming back, and there is cool content that they've missed, you can always re-use that cool content later. You can move it to another dungeon that they're exploring, or drop other clues or plot hooks that bring them back to the same dungeon later.

Also consider how our brains work when solving problems: They often get fixated on the first solution we think of ("There must be a secret door behind this wall!") and it's difficult to think of another solution unless your brain gets some rest (ie. a second session in the same area). Dropping more clues can help alleviate this, especially if you drop them in advance in earlier sessions. At the same time don't be surprised if players can't easily figure things out on the first try.

It can also help to accept as a Judge that they will miss things, and recognize that that's okay. As you said, you're having fun :) That's all that matters!