Outfits are important to the hero. Always makes sure that the costume or disguise your wearing fits your superpower, take the green lantern for example, he can emit green rays from his ring and fly, so he put on a green and black suit. And it fit the powers he has perfectly! And if you have powers like that of Superman, don't wear a costume that has your tights showing on the outside. I know it's a trademark but it's a completely creepy look, to see a super hero with his tights on the outside.

The best kind of suits there is out there are the suits that have gadgets built into them. Think of Tony Stark (aka Iron Man), and Samus Aran, they both have fully powered body suits that have built in gadgets to help them fight! If you do get a suit, get a nice paint job to go with it, like flames (that be my choice if had a fully powered body suit). One last thing on costumes, masks, if your gonna get costume to disguise the body, get some thing that will cover you head or face so that villains or people don't figure you out if your in battle.