VOX has posted ‘s artical ‘Keanu Reeves, explained’. It’s a good read. It also used a quote from a 2005 Time article. For those who haven’t seen the Time article, it is also a decent read.
In 2005, Time observed of the Matrix star:
His voice has a certain forced, hollow depth, like a 12-year-old trying to sound grownup. His talent is hard to pin down, which is one reason a lot of critics think he doesn’t have any. But they’re wrong. … Something about that mysterious reserve, the total earnestness, the unwinking way he commits to the most absurd scenarios, makes free falls from planes and wire-fighting cyberninjastics feel like a philosophy lesson.