You may remember this question from Red vs Blue.
I'll name a couple for examples:
The ability to fly, but you can only fly true North.
Super strength, but you can only when standing completely still.
[spoiler]This is inspired by Peaches Pan Tao.[/spoiler]
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Aquaman powers (whatever the -blam!- you call them). Wow he can talk to fish, big whoop. I can imagine him, in a corner of the superhero headquarters, concentrating really hard next to the fish tank. Batman: "hey Aquaman come here!" Aquaman: "in a minute Bruce I'm this lil dude lost his son" Batman: "......"