Jessica's a BAMF. She needs to show up in more things. There's something very interesting and unique about a character who has superpowers and yet refuses to use them most of the time. Most superheroes suddenly KNOW how to fight and are good at it, but Jessica never was, really. I like how her series deals with her kind of trying to find her place in the world if she has no aptitude for fighting crime. I also like that she will still kick ass if necessary. Also, I kind of just realized how stupid most of Marvel's villains look. Kang's a tiny bit less weird looking then Galactus, but not by much.
Luke uses some...interesting terms for the FF. Also, this is part of the best storyline in comics history, where Doc Doom skips town without paying Luke for a job, and Luke breaks into the Baxter Building, fights the FF, and takes one of their jets that he magically knows how to fly and goes to Latveria to get his 200 bucks. Power Man may not be the best comic ever made, but if I was stuck on a desert island and had to pick one comic, that would be the one.
Allegedly Mandarin is a pretty strong foe, and a formidable enemy for (I believe) Iron Man, but that doesn't stop him from looking ridiculous. He's like Mr. Miyagi dressed in an ornamental kimono floating in the air for no apparent reason.