alt Hacker NewsThe recommended videos next to the current video and generally awful now. But my YouTube usage almost exclusively starts on the first row of videos they show when I'm logged in. They're almost entirely recent uploads from the channels I subscribe to and what most often. I subscribe to too many channels to keep up on the full feed of uploaded, but YouTube seems to do a good job highlighting the subscriptions I'm most interested in.
Admittedly, I rarely "browse" YouTube looking for new things. I typically find new channels either from other sources (reddit, Twitter, etc.) or because one channel mentions another channel.
Now that you mention it. First row is usually best for new interesting videos. After that, I usually click on the subscriptions page and discover some new interesting stuff from the last couple of days.