The temptation is to go big and tackle the biggest questions in the field.
This leads to a lot of opinions, limited agreement, and no value to members.
It's far easier (and more valuable) to get answers to narrow, specific, questions.
In the past week, Community Geek members have explained how to deal with the EU cookie law, improve the forgotten-password process, created CRM documentation templates, and shown how to reduce the time/improve the reliability of the activation e-mail.
That's useful information. Everyone, especially us, learned something new.
You will probably generate more value from getting answers to narrow questions, than big, broad, issues.