What is your go-to "easy but inpressive" riff?

Like the title says, what's your favorite guitar riff that sounds cool/complex but is super easy to play?

(Kinda sorta asking because I've been playing guitar for over a decade and yet the only thing I'm good at are power chords)

EDIT: Thank you all for your many MANY responses. I think this is my most popular post of all time. I've taken every suggestion into account and plan on practicing all of them. I also appreciate that nobody has pointed out the typo in the title.