User blog comment:Jacknapier10/Superheroes Wear Tights?/@comment-5111077-20130521142620/@comment-3406131-20130521150145

Well, Charles have his own tight suit (cf Civil War: House of M), and Namorita and She-Hulk are in swimsuits..

And all on your list wears tights or very near to the body pants, except for those who are naked and those in leather. Even the Punisher use to wears SHIELD-like uniforms. Better seing those thigh as "Combat suit". That's sound better. (And all the Captain Marvel I know were their underwear on their pants/tights..)

The recent X-Forcers have less tight but still. This is the tradition, and most of the characters wear clothes close to the body. Thanks that Triage and the X-Students now use classic school uniforms. (and Triage use them even on battlefield)