I'm really enjoying the website format - it's easy to cross-post to different tribes at once, share multiple different media types at once, and overall the site (for me) is extremely user friendly. It needs a few tweaks yet, but so far I love it.

That, and the overall positive attitude of users. No bots allowed. No negativity or circle-jerking (that I've seen so far).

For me, it's basically a fresh start. Take what was really cool about Reddit and make it better.