micro ... ??? ... there IS no standard, imo.
Micros are what they are ... 'micros'. You are seated at a table where you may not have ever played any of the other players before. You have NO reads, NO info, and the same size stack.
On your right, an all-in maniac, on your left a calling station. Or maybe a super-nitty tag on your right and a LAG on your left. What position are you in? UTG? EP? MP? Btn?
Even at low and micro stakes, it is situational and positional, imo. Overall, a tight game if you want to stay and play. If you are prone to strike big, build a stack, or bust and move on... then LAG is for you.
Is your first hand an AJ in EP or the SB? Makes a huge difference. There cannot be one 'absolute' answer other than committing to a particular overall 'style' of play and only YOU know what you are comfortable with.
Me? I'm a nitty-TAG but only play MTT's in the 2,000+ field sizes. I'm sure there may a 90-SnG regular player with a different view.