I wish Rogue had a more fleshed out relationship with Kurt. I know she sometimes rejects identifying Mystique as a mother figure but you would think she might want to establish a sibling-like relationship with her step-brother. This is another area in where Evolution shined. ignoring the fact that in the comics nightcrawler has a weird history with stepsisters...

Or heck, I even kinda miss Mystique butting into her life right about now.