Long time reader of the X-men, and one of my pet peeves has been that there are so many mutants running around now that the X-men and mutants in general, no longer feel as 'special' as they were in the past. The coolest thing about mutants was whether they robbed a bank or stopped a bank robbery, they were still feared and shunned by the general populace for being born different.
Here's my challenge to you - if the Marvel universe could have ONLY 24 mutants on Earth, and each of them HAD to join either the X-Men or the Brotherhood, who would you have on each side? Who would head up each faction?