The Marvel rpg seems to be quite good, if a bit finicky at times (or so it seems from reading it). The building of dice pools is pretty central. You take a die from Affiliations (how well you work in the given situation, whether alone, with a buddy/sidekick, or as part of a team), a die from Distinctions (personality, epithet etc), a die from Powers, and a die from Specialties (very broad skills like Combat, Science, or Covert) and roll the lot together. 

There are a number of ways to gain plot points, and to use them to gain more or better dice. That's the finicky part, and it'll take some getting used to.

The chargen system is very bare-bones. It's basically: "find or create a comic book character, and then stat them up as it makes sense. no dice, no point-buy". This is easier than it sounds, and it's hard to make a seriously unbalanced character. Since putting out the game they've put out a random chargen system too. I haven't tried it, but it looks a lot like the one in ICONS. 

A nice touch is that each character has his/her own xp 'milestones'. Like so:

Got a Human Heart
1 XP … when you first use your powers to give a support asset to an ally
3 XP … when you either take trauma to save a non-combatant or convince an opponent to attack you rather than a non-combatant
10 XP … when you sacrifice yourself for your allies or fight until you’re the last hero to fall

(Borrowed those from someone's Cliff Steele/Robotman write-up).

Milestones can be changed, depending on which version of the character one plays.