Many topics here cover who users believe should be on the JLA roster.
However, here's an interesting spin on the whole JLA question:
What would your JLA roster look like if the following were not part of the League:
- Superman (or Supergirl, Superboy etc.)
- Batman (or Nightwing, Robin, Batwoman, Batgirl)
- Wonder Woman
- The Flash (any)
- Green Lantern (any)
- Martian Manhunter
- Green Arrow
...and as a final question, who would the leader be?