At the micros I think the less info you have the better, as you can focus more on reading hand and less on stats. I would go for the following:

Hands/VPIP/PRF/3bet/Aggression.

The stats above give you a quick snapshot on the player type, for example, if you see a 23/20/6 you know they are regish, probably study and have a decent grasp on the game.

If you see a 19/4/2 3bet you, and they 3bet or 4bet you, you know they have only KK-AA.

When I play any stakes I just have the stats above so I can quickly profile a player as a reg, fish or rec and play accordingly.

Hey, feel free to use our 6-max HUD (this is what all our students on the Micros are using): Link to HUD + Explanation Video Explanation Video.

The HUD is made specifically for our students by Alan Jackson, one of the best (if not the best) DB expert in poker, author of PokerMetrics, and author of many videos for Holdem Manager. He's also coaching on our 6-max team.

Thanks very much!

You're welcome!

Here's what I've been using for a few years.

One of the most useful stats I find that most players don't use is the Raise First In %. This is great for spotting positionally unaware opponents, and those opening every BTN and SB etc.

The HUD recommended by @BestPokerCoaching looks great especially in the context of micro stakes. I'm somewhat familiar with Alan Jackson's work back in the BlueFirePoker days and he's certainly the expert when it comes to stats/database analysis.