RSS or Atom – Which one you prefer?

I am trying to learn everything about syndication and I learn something new everyday. I have been working on a syndication-framework (features: create, aggregate, publish, merge, cache etc) for last four-five months.
I mostly spent time understanding RSS (and various modules/extension) and a few things about Atom. I prefer (subscribing/publishing) RSS 2.0 because it’s simple and I like it.
What do you prefer RSS or Atom? And why?
It would be great to know everyone’s perspective. Thanks.