I feel Stack Overflow is a great place for any one interested in learning new things. But I feel there is a scope for improvement in the site.
One such case I feel that needs to be sorted out is, For example when I open the Stack Overflow page I see all the recent questions posted by Users across the site. Among those questions there would be several questions related to technology which I am unaware of at all.
So I feel that instead of displaying all the recent questions, filtering the questions based on the Logged in User's favourite tags would be great. So that User can actually see questions which he is aware of.
Hope to see this being implemented in Stack Overflow to be even more effective.