I voted for a bunch I want to see more of, 'cause I'm unable to commit / a filthy two-timing cheater.
Blink - number one with a bullet. I like her almost as much as Nightcrawler, who is one of my absolute favorite mutants of all time! I like how she's sort of weaponized her power and can throw 'daggers' of energy that teleport people they hit away.
Shatterstar - I don't actually care that he's a teleporter (named Ben, this week). Remember when he (and Cable) didn't have a mutant power at all, because Liefield didn't realize his X-Force 'mutants' needed one? Then he suddenly got a super-powerful energy blast he used like, *three times* before it got forgotten and went away? Good times. But I love who the character has become post-Liefield, and want to see more.
Lila Cheney - I don't want to see her on a team, but I *do* want to see her an active part of the Krakoan cultural outreach, with her music being yet another angle by which mutant culture is spreading across the globe (and perhaps further, because you know Lila has fans in the Shiar Empire (at least one, Sam Guthrie!), which Beyonce sure can't claim!).
Silhouette - a unique power, and a fun diverse character. Agreed that the X-offices should have snatched her up after the New Warriors were done with her.
Vanisher - I still fondly remember him as 'Fagin' wannabe in the Fallen Angels mini, and kinda want him back, with that same questionable morality, but being basically too lazy and lacking in brilliant schemes to be an actual super-villain, and falling into good-guy stuff because that's where the crowd seems to be going.
Slipstream - I don't care what anyone says, a dude who uses a surfboard to get around is awesome. (And yes, I know the Silver Surfer did it first, and better!) It's just a fun visual, and could be developed in interesting ways to make it more useful outside of just serving as a 'team bus.' (Something that the best teleporters, Nighty, Magik and Blink, already have down!)
Add to the list;
Lourdes Chantal - Jaunt, formerly of the Hellfire Club.
Zero - robot working for Stryfe, personal 'team bus' for the Mutant Liberation Front.
Amelia Vought - another of Chuck's exes.
U-Go Girl - from X-Statix
Cloak - is he a mutant this week? I don't even know...