Just chiming in as an EABA fan...
The universal chart - I like it a lot, especially for modern and scifi games where players can figure out for themselves how hard it'd be to hit a target. That just feels right. There's some carry over there to missile combat in fantasy too, of course. And heck, it's also good for quickly figuring out how long it'll take an archetypal wizard to read some text.
The bounded range for skill resolution is incredibly nice, but especially so on the GM side, for world building.
The combat system is very cool in how you're driving toward resolution of the conflict one way or another.
The powers system. That's something that I'm not so good at. I managed to learn Hero, so maybe it's time to give powers another try.