Tips for the Playstation ecosystem.

So the last Playstation that I owned was the original PS. After that I've been in the xbox eco system. My xbox died recently and I've decided at the end of this month to pick up a Playstation Pro and give that ecosystem a ride again.

Now I already know what games i'm going to play, so what i'm asking is how is the OS of the Playstation now.

1. Any quirks that I should know about? How to get past them?
2. Things that are extremely easy?
3. Things that are extremely annoying?
4. Things you wish you knew when you first got into the PS World?
5. Any tips? I usually only download my games, and shared them with a buddy of mine using the "My Home" feature for xbox.

Thanks for any information that will help me out!