I think member category should be like this:
Regular Members > More than 100 posts and Less than 1,000 Posts.
Senior Members > More than 1,000 Posts and Less than 3,000 Posts.
Respected Members > More than 3,000 Posts and less than 5,000 Posts.
Elite/Premium Members > More than 5,000 Posts.
and STAR Members > More than 1,000 Posts and who spend sometime on DFI. Anyone who fulfils this criteria can become STAR members. Then once this basic criteria is passed then Quality or/and Contribution will make that member eligible as STAR member. Like T-Shering22 did.
After few changes today, Hardly anyone will be left as Respected Members and many members won't post much as even a member with 300 post can become Elite Member. We should take care of both Quality as well as Quantity. There should be reward for either as well as both too. Otherwise why to post 500+ in a month when only 50 can promote you ? It's easy to make 50 quality post in a month compare with 500 good post including 100 quality post. Just my opinion.