I haven't played a lot of NL100 yet. But from what I can tell there's a LOT more aggression. It's hard as hell to know when your AA or KK are good in any situation. Look at my second hand again. That guy went all out with MIDDLE PAIR with a good kicker.

The higher you go up in levels the more aggression you see. Which is a good thing if you can get them playing back at you like I just did.