What Exchange 2010 components do you find most useful?

As we all know, there are several Exchange 2010 templates in APM.

Which templates do you find most useful?

Do you combine component monitors from more than one template into a custom template? If so, which components do you find most valuable?

Grateful for your opinions!

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I would like to get this question answered as well. Anyone?

Although targeted at Exchange 2003, the most recent post in the thread Monitoring Exchange 2003 contains a link (http://www.computerperformance.co.uk/HealthCheck/Exchange_Health.htm#Monitor%20Queues) to some interesting items to monitor in Exchange.

Anyone else?