ROFLMAO!!

In the world of real super heroes I'd say the top 3 most useless superpowers would have to be:

3/ Green Arrow. Okay, the guy's a top-notch Robin Hood archer... but as a member of the JLA, alongside gods like Wonder Woman and Superman... an archer feels like the fifth wheel.

2/ Aquaman. He has the ability to telepathetically communicate with fish. It could be useful if he were a member of the Sea Shepherd, telling whales to flee from Japanese whalers... but as a member of the JLA it seems kinda lame.

1/ Ma-Ti. The power of "heart" - the power to talk to animals - is pret-ty lame. Having the power of Dr. Do-Little is pretty lame when the other Planeteers can control the very elements themselves! On one hand it's better than Aquaman because it's not exclusively restricted to marine life, but I rank Ma-Ti below Aquaman because let's face it, Ma-Ti is the "Wheelie" of the Planeteers.