It's interesting just how far the character has come since her breakthrough under Morrison. Over the last 20 years she's remained a central figure in each era.
Even now, she probably appears more across the Xbooks than any single character and is consistently being used in the wider MU by writers, second only to Wolverine and maybe even more so recently.
At this stage given just how much she appears you could argue that she is now the X-Men's leading lady. Who's even come close to her in the last 15 years if we take them as a whole?
What is it about the character that has allowed her to break through like this, and why are so many creators drawn to her?