Oof, that'd be a tough one. If these things come with downsides then that narrows it down a little...

[ He looks Dazai up and down, as if trying to catch sight of any visual inconsistencies. ]

Well, I'm gonna guess it's not mind-reading or super-strength, since you gave me that one. And you haven't tried flying yet, unless you can only do that when you're drunk or something...

[ Oh, he is going to down a list, you've really done it now. ]

Can you talk to animals or plants?